Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2023-3519
Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability - [Actively Exploited]
Description

Unauthenticated remote code execution

INFO

Published Date :

July 19, 2023, 6:15 p.m.

Last Modified :

Oct. 24, 2025, 1:42 p.m.

Remotely Exploit :

Yes !
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution.

Required Action :

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes :

https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467; https://nvd.nist.gov/vuln/detail/CVE-2023-3519

Affected Products

The following products are affected by CVE-2023-3519 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Citrix netscaler_application_delivery_controller
2 Citrix netscaler_gateway
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL [email protected]
CVSS 3.1 CRITICAL [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Upgrade to version 12.1-55.297-FIPS, 13.1-37.159-FIPS, 13.0-91.13, 13.1-49.13 or later.
Public PoC/Exploit Available at Github

CVE-2023-3519 has a 49 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-3519 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-3519 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 22 hours, 14 minutes ago
0 stars 0 fork 0 watcher
Born at : Dec. 9, 2025, 4:54 p.m. This repo has been linked 12 different CVEs too.

Forked from https://github.com/0xor0ne/awesome-list.git

Updated: 2 months ago
0 stars 0 fork 0 watcher
Born at : Oct. 10, 2025, 9:01 a.m. This repo has been linked 102 different CVEs too.

Forked from https://github.com/0xor0ne/awesome-list.git

Updated: 1 month, 4 weeks ago
1 stars 0 fork 0 watcher
Born at : Oct. 6, 2025, 2:32 p.m. This repo has been linked 102 different CVEs too.

list of cve from 2001 to 2024

Python

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 26, 2025, 12:13 a.m. This repo has been linked 85 different CVEs too.

None

Updated: 2 months, 4 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 11, 2025, 6:49 p.m. This repo has been linked 2 different CVEs too.

A professional SOC-style cyber threat intelligence dashboard built using React and Express.js. This project simulates real-time tracking of APT27 (aka Silk Typhoon) activities using verified IOCs, CVEs, and MITRE ATT&CK mappings.

Updated: 4 months ago
0 stars 0 fork 0 watcher
Born at : Aug. 7, 2025, 11:37 a.m. This repo has been linked 3 different CVEs too.

None

Updated: 4 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : July 25, 2025, 7:02 p.m. This repo has been linked 96 different CVEs too.

None

Python Shell

Updated: 5 months ago
0 stars 0 fork 0 watcher
Born at : July 4, 2025, 5:10 a.m. This repo has been linked 3 different CVEs too.

None

Updated: 5 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : June 29, 2025, 6:30 a.m. This repo has been linked 94 different CVEs too.

None

Updated: 6 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : May 18, 2025, 7:24 p.m. This repo has been linked 1 different CVEs too.

This is my starred repositories including the description for each tool. Makes search/filter over them easier.

Updated: 4 months, 3 weeks ago
51 stars 6 fork 6 watcher
Born at : Feb. 26, 2025, 11:57 a.m. This repo has been linked 91 different CVEs too.

None

PowerShell C#

Updated: 6 months, 1 week ago
2 stars 0 fork 0 watcher
Born at : Oct. 11, 2024, 6:07 a.m. This repo has been linked 28 different CVEs too.

None

Python

Updated: 1 year, 5 months ago
0 stars 0 fork 0 watcher
Born at : June 25, 2024, 9:01 p.m. This repo has been linked 3 different CVEs too.

Latest CVEs with their Proof of Concept exploits.

Python

Updated: 2 weeks ago
932 stars 118 fork 118 watcher
Born at : May 24, 2024, 11:02 a.m. This repo has been linked 52 different CVEs too.

None

Updated: 1 year ago
1 stars 0 fork 0 watcher
Born at : May 16, 2024, 2:53 p.m. This repo has been linked 48 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-3519 vulnerability anywhere in the article.

  • CrowdStrike.com
MURKY PANDA: A Trusted-Relationship Threat in the Cloud

Since late 2024, CrowdStrike Counter Adversary Operations has observed significant activity conducted by MURKY PANDA, a China-nexus adversary that has targeted government, technology, academic, legal, ... Read more

Published Date: Sep 16, 2025 (2 months, 3 weeks ago)
  • BleepingComputer
Murky Panda hackers exploit cloud trust to hack downstream customers

A Chinese state-sponsored hacking group known as Murky Panda (Silk Typhoon) exploits trusted relationships in cloud environments to gain initial access to the networks and data of downstream customers ... Read more

Published Date: Aug 22, 2025 (3 months, 2 weeks ago)
  • The Cyber Express
China-linked Silk Typhoon Hackers Target SaaS Providers, Zero Days

The China-linked advanced persistent threat (APT) group Silk Typhoon has shown a rare ability to compromise trusted relationships in the cloud. That’s one of the key takeaways from new research by Cro ... Read more

Published Date: Aug 22, 2025 (3 months, 2 weeks ago)
  • Help Net Security
China-linked Murky Panda targets and moves laterally through cloud services

In its recently released 2025 Threat Hunting Report, Crowdstrike pointed out an interesting trend: a 136% surge in cloud intrusions. A good chunk of this surge is due to “China-nexus adversaries”, Mur ... Read more

Published Date: Aug 22, 2025 (3 months, 2 weeks ago)
  • The Hacker News
Chinese Hackers Murky, Genesis, and Glacial Panda Escalate Cloud and Telecom Espionage

Cybersecurity researchers are calling attention to malicious activity orchestrated by a China-nexus cyber espionage group known as Murky Panda that involves abusing trusted relationships in the cloud ... Read more

Published Date: Aug 22, 2025 (3 months, 2 weeks ago)
  • Cyber Security News
Citrix NetScaler ADC and Gateway Vulnerability Actively Exploited in the Wild

Cloud Software Group has issued an urgent security advisory warning customers about a critical memory overflow vulnerability in NetScaler ADC and Gateway products, which could enable denial-of-service ... Read more

Published Date: Jun 25, 2025 (5 months, 2 weeks ago)
  • security.nl
FBI: ransomware-aanvallen via jaren oude Citrix-kwetsbaarheden

Aanvallers maken nog altijd gebruik van jaren oude Citrix-kwetsbaarheden om organisaties met ransomware te infecteren, zo stelt de FBI. Ook oude kwetsbaarheden in firewalls van Palo Alto Networks en B ... Read more

Published Date: Apr 04, 2025 (8 months ago)
  • Dark Reading
China's Silk Typhoon APT Shifts to IT Supply Chain Attacks

Source: Chebakalex7 via ShutterstockThe China-backed cyber-espionage group known as "Silk Typhoon" has begun targeting organizations in the IT supply chain to gain access to their downstream customers ... Read more

Published Date: Mar 05, 2025 (9 months ago)
  • BleepingComputer
Silk Typhoon hackers now target IT supply chains to breach networks

Microsoft warns that Chinese cyber-espionage threat group 'Silk Typhoon' has shifted its tactics, now targeting remote management tools and cloud services in supply chain attacks that give them access ... Read more

Published Date: Mar 05, 2025 (9 months ago)
  • The Register
China's Silk Typhoon, tied to US Treasury break-in, now hammers IT and govt targets

Silk Typhoon, the Chinese government crew believed to be behind the December US Treasury intrusions, has been abusing stolen API keys and cloud credentials in ongoing attacks targeting IT companies an ... Read more

Published Date: Mar 05, 2025 (9 months ago)
  • The Hacker News
China-Linked Silk Typhoon Expands Cyber Attacks to IT Supply Chains for Initial Access

Network Security / Data Breach The China-lined threat actor behind the zero-day exploitation of security flaws in Microsoft Exchange servers in January 2021 has shifted its tactics to target the infor ... Read more

Published Date: Mar 05, 2025 (9 months ago)
  • Help Net Security
What 2024 taught us about security vulnerabilties

From zero-day exploits to weaknesses in widely used software and hardware, the vulnerabilities uncovered last year underscore threat actors’ tactics and the critical gaps in organizational defenses. T ... Read more

Published Date: Jan 14, 2025 (10 months, 3 weeks ago)
  • TheCyberThrone
Chinese MirrorFace APT targets Japan

The MirrorFace Advanced Persistent Threat (APT) group, also known as Earth Kasha, has been linked to a series of cyber-attacks targeting Japan. These attacks have been ongoing since 2019 and have prim ... Read more

Published Date: Jan 12, 2025 (10 months, 4 weeks ago)
  • Dark Reading
Chinese APT Group Is Ransacking Japan's Secrets

Source: Birgit Korber via Alamy Stock PhotoThe National Police Agency and the National Center of Incident Readiness and Strategy for Cybersecurity warned Japanese organizations of a sophisticated Chin ... Read more

Published Date: Jan 10, 2025 (11 months ago)
  • BleepingComputer
MirrorFace hackers targeting Japanese govt, politicians since 2019

The National Police Agency (NPA) and the Cabinet Cyber Security Center in Japan have linked a cyber-espionage campaign targeting the country to the Chinese state-backed "MirrorFace" hacking group. The ... Read more

Published Date: Jan 09, 2025 (11 months ago)
  • Cybersecurity News
MirrorFace: Unmasking the Chinese Cyber Espionage Group Targeting Japan

On January 8, 2025, the Japanese National Police Agency (NPA) issued a critical warning regarding ongoing cyberattacks attributed to the MirrorFace group, also known as “Earth Kasha.” Active since 201 ... Read more

Published Date: Jan 09, 2025 (11 months ago)
  • Trend Micro
Spot the Difference: Earth Kasha's New LODEINFO Campaign And The Correlation Analysis With The APT10 Umbrella

This blog is based on a presentation by the authors at Virus Bulletin 2024. Introduction LODEINFO is a malware used in attacks targeting mainly Japan since 2019. Trend Micro has been tracking the grou ... Read more

Published Date: Nov 19, 2024 (1 year ago)
  • TheCyberThrone
Top 15 Most Exploited Vulnerabilities in 2023

In a joint cybersecurity advisory, the security agencies across the world have identified the most exploited vulnerabilities of 2023. This advisory, coauthored by the Cybersecurity and Infrastructure ... Read more

Published Date: Nov 16, 2024 (1 year ago)
  • The Register
Five Eyes infosec agencies list 2024's most exploited software flaws

The cyber security agencies of the UK, US, Canada, Australia, and New Zealand have issued their annual list of the 15 most exploited vulnerabilities, and warned that attacks on zero-day exploits have ... Read more

Published Date: Nov 14, 2024 (1 year ago)
  • Help Net Security
Zero-days dominate top frequently exploited vulnerabilities

A joint report by leading cybersecurity agencies from the U.S., UK, Canada, Australia, and New Zealand has identified the most commonly exploited vulnerabilities of 2023. Zero-day vulnerabilities on t ... Read more

Published Date: Nov 14, 2024 (1 year ago)

The following table lists the changes that have been made to the CVE-2023-3519 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Oct. 24, 2025

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519
  • Modified Analysis by [email protected]

    Mar. 10, 2025

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 13, 2025

    Action Type Old Value New Value
    Changed Description Unauthenticated remote code execution Unauthenticated remote code execution
  • Modified Analysis by [email protected]

    Jan. 27, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:citrix:netscaler_application_delivery_controller:11.1-65.22:*:*:*:fips:*:*:* *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 13.1 up to (excluding) 13.1-37.159 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13 OR *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 13.1 up to (excluding) 13.1-37.159 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html
    Added Reference https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467
  • Modified Analysis by [email protected]

    Jun. 27, 2024

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Aug. 04, 2023

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 19, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467 No Types Assigned https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467 Vendor Advisory
    Added CWE NIST CWE-94
    Added CPE Configuration OR *cpe:2.3:a:citrix:netscaler_application_delivery_controller:11.1-65.22:*:*:*:fips:*:*:* *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions from (including) 12.1 up to (excluding) 12.1-55.297 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions from (including) 13.1 up to (excluding) 13.1-37.159 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.0-91.13 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.1 up to (excluding) 13.1-49.13
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

94.06 }} -0.02%

score

0.99890

percentile