Known Exploited Vulnerability
9.8
CRITICAL
CVE-2019-9874
Sitecore CMS and Experience Platform (XP) Deserial - [Actively Exploited]
Description

Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

INFO

Published Date :

May 31, 2019, 9:29 p.m.

Last Modified :

March 27, 2025, 1 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
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 :

Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

Required Action :

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes :

https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874

Affected Products

The following products are affected by CVE-2019-9874 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 Sitecore cms
2 Sitecore experience_platform
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-9874.

URL Resource
https://dev.sitecore.net/Downloads.aspx Product Vendor Advisory
https://www.synacktiv.com/blog.html Third Party Advisory
https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf Exploit Patch Third Party Advisory
https://dev.sitecore.net/Downloads.aspx Product Vendor Advisory
https://www.synacktiv.com/blog.html Third Party Advisory
https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf Exploit Patch Third Party Advisory

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).

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

The following list is the news that have been mention CVE-2019-9874 vulnerability anywhere in the article.

  • Cyber Security News
CISA Adds Sitecore CMS Code Execution Vulnerability to List of Known Exploited Vulnerabilities

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has officially added two critical Sitecore CMS vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of ... Read more

Published Date: Mar 27, 2025 (5 days, 12 hours ago)
  • TheCyberThrone
CISA KEV Catalog Update Part VII – March 2025

CISA’s add vulnerabilities related to Sitecore CMS and Reviewdog GitHub Actions to its Known Exploited Vulnerabilities (KEV) catalog1. Sitecore CMS VulnerabilitiesCISA has identified critical vulnerab ... Read more

Published Date: Mar 27, 2025 (5 days, 15 hours ago)
  • The Hacker News
CISA Warns of Sitecore RCE Flaws; Active Exploits Hit Next.js and DrayTek Devices

Vulnerability / Threat Intelligence The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two six-year-old security flaws impacting Sitecore CMS and Experience Platform (XP) to it ... Read more

Published Date: Mar 27, 2025 (5 days, 17 hours ago)

The following table lists the changes that have been made to the CVE-2019-9874 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.

  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Mar. 27, 2025

    Action Type Old Value New Value
    Added Date Added 2025-03-26
    Added Due Date 2025-04-16
    Added Required Action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
    Added Vulnerability Name Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 26, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-502
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://dev.sitecore.net/Downloads.aspx
    Added Reference https://www.synacktiv.com/blog.html
    Added Reference https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 03, 2019

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf No Types Assigned https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf Exploit, Patch, Third Party Advisory
    Changed Reference Type https://www.synacktiv.com/blog.html No Types Assigned https://www.synacktiv.com/blog.html Third Party Advisory
    Changed Reference Type https://dev.sitecore.net/Downloads.aspx No Types Assigned https://dev.sitecore.net/Downloads.aspx Product, Vendor Advisory
    Added CWE CWE-502
    Added CPE Configuration OR *cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:* versions from (including) 7.0 up to (including) 7.2 *cpe:2.3:a:sitecore:experience_platform:*:*:*:*:*:*:*:* versions from (including) 7.5 up to (including) 8.2
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.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-9874 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-2019-9874 weaknesses.

Exploit Prediction

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

33.80 }} -45.89%

score

0.96589

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability