CVE-2026-48939
iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability - [Actively Exploited]
Description
A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
INFO
Published Date :
June 20, 2026, 1:16 p.m.
Last Modified :
July 11, 2026, 5:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
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.
iCagenda contains an unrestricted upload of file with dangerous type vulnerability that allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Unknown
https://www.icagenda.com/#download ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-48939
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 6ff30186-7fb7-4ad9-be33-533e7b05e586 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update the iCagenda extension to the latest version.
- Configure file upload restrictions.
- Disable unnecessary file upload features.
Public PoC/Exploit Available at Github
CVE-2026-48939 has a 8 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-48939.
| URL | Resource |
|---|---|
| https://www.icagenda.com/ | Product |
| https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 | Exploit Third Party Advisory |
| https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ | Third Party Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 | US Government Resource |
| https://www.icagenda.com/docs/changelog/icagenda-3-9-15 | Release Notes |
| https://www.icagenda.com/docs/changelog/icagenda-4-0-8 | Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48939 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-2026-48939
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).
iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
Python
None
Python JavaScript Shell
None
Python PHP
Pre-auth arbitrary file upload RCE exploit for iCagenda Joomla extension < 4.0.8 (CVSS 10.0)
exploit file-upload joomla pentesting python rce security-tools cve-2026-48939 icagenda
Python
iCagenda Unauthenticated File Upload to RCE
Threat Hunting based on KQL
Panel de ciberamenazas que se actualiza solo: nuevas amenazas y vulnerabilidades activas cada 6 horas.
CSS Python HTML JavaScript
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48939 vulnerability anywhere in the article.
-
The Cyber Express
ZTNA Emerges as VPN Security Risks Put Federal Networks on Alert
Federal agencies are facing growing pressure to evaluate ZTNA as an alternative to traditional VPN architectures, as cybersecurity threats expose weaknesses in internet-facing remote access systems. W ... Read more
-
The Cyber Express
CISA Adds SonicWall SMA1000 Vulnerabilities to KEV Catalog Following Active Exploitation
Security researchers have identified two critical vulnerabilities, CVE-2026-15409 and CVE-2026-15410, affecting SonicWall SMA1000 Series appliances. The flaws are already being exploited in the wild, ... Read more
-
The Cyber Express
Microsoft’s Largest Patch Tuesday Fixes 622 Vulnerabilities, Two Under Active Attack
Microsoft Patch Tuesday July 2026 delivered the company’s largest security update to date, addressing 622 Microsoft CVEs, more than tripling the roughly 200 vulnerabilities patched in June. Among the ... Read more
-
The Cyber Express
Three Russians Indicted in $62M Cybercrime Scheme Targeting U.S. Infrastructure
Three Russian nationals have been charged in a sweeping Russian cybercrime indictment tied to an alleged bulletproof hosting operation that U.S. authorities say enabled ransomware, malware, phishing, ... Read more
-
The Cyber Express
RabbitMQ Vulnerability Exposes OAuth Secrets to Attackers
A newly disclosed RabbitMQ vulnerability, tracked as CVE-2026-5721, has raised concerns among enterprise users after researchers revealed that the flaw could allow unauthenticated attackers to retriev ... Read more
-
security.nl
Joomla-websites aangevallen via kwetsbare extensies meldt VS
Joomla-websites zijn het doelwit van aanvallen waarbij aanvallers kwetsbaarheden in de extensies iCagenda en Balbooa Forms misbruiken om PHP-code op de webserver uit te voeren, zo meldt het Amerikaans ... Read more
-
The Cyber Express
CISA Warns of Actively Exploited Joomla Zero-Day Vulnerabilities
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added CVE-2026-48939 and CVE-2026-56291 to its Known Exploited Vulnerabilities (KEV) catalog after reports confirmed active zero-da ... Read more
-
The Hacker News
iCagenda and Balbooa Forms Joomla Flaws Reportedly Exploited as Zero-Days
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two maximum-severity security flaws impacting iCagenda and Balbooa extensions for Joomla to its Known Exploited Vulnerabiliti ... Read more
The following table lists the changes that have been made to the
CVE-2026-48939 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 Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 11, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-10T17:37:31.710914Z'} {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T00:00:00+00:00'} -
Modified Analysis by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Reference Type CISA-ADP: https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 Types: US Government Resource -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Jul. 10, 2026
Action Type Old Value New Value Added Date Added 2026-07-10 Added Due Date 2026-07-10 Added Required Action 2026-07-10 Added Vulnerability Name 2026-07-10 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 10, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939 Changed SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T00:00:00+00:00'} {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-10T17:37:31.710914Z'} -
CVE Modified by [email protected]
Jul. 05, 2026
Action Type Old Value New Value Added CWE CWE-434 Removed CWE CWE-284 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-02T16:14:42.278706Z'} {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/Polosss/By-Poloss..-..CVE-2026-48939 Changed SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T00:00:00+00:00'} {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-02T16:14:42.278706Z'} -
Initial Analysis by [email protected]
Jun. 30, 2026
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-434 Added CPE Configuration OR *cpe:2.3:a:joomlic:icagenda:*:*:*:*:-:joomla!:*:* versions from (including) 3.2.1 up to (excluding) 3.9.15 *cpe:2.3:a:joomlic:icagenda:*:*:*:*:-:joomla!:*:* versions from (including) 4.0.0 up to (excluding) 4.0.8 Added Reference Type Joomla! Project: https://www.icagenda.com/ Types: Product Added Reference Type CISA-ADP: https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ Types: Third Party Advisory Added Reference Type CISA-ADP: https://www.icagenda.com/docs/changelog/icagenda-3-9-15 Types: Release Notes Added Reference Type CISA-ADP: https://www.icagenda.com/docs/changelog/icagenda-4-0-8 Types: Release Notes -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 25, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T17:44:17.887254Z'} {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-24T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 24, 2026
Action Type Old Value New Value Added Reference https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/ Added Reference https://www.icagenda.com/docs/changelog/icagenda-3-9-15 Added Reference https://www.icagenda.com/docs/changelog/icagenda-4-0-8 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-48939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T17:44:17.887254Z'} -
CVE Modified by [email protected]
Jun. 22, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'icagenda.com', 'product': 'iCagenda extension for Joomla', 'versions': [{'status': 'affected', 'version': '1.0.0-3.9.14'}, {'status': 'affected', 'version': '4.0.0-4.0.7'}], 'defaultStatus': 'unaffected'}] [{'vendor': 'icagenda.com', 'product': 'iCagenda extension for Joomla', 'versions': [{'status': 'affected', 'version': '3.2.1-4.0.7'}], 'defaultStatus': 'unaffected'}] -
New CVE Received by [email protected]
Jun. 20, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'icagenda.com', 'product': 'iCagenda extension for Joomla', 'versions': [{'status': 'affected', 'version': '1.0.0-3.9.14'}, {'status': 'affected', 'version': '4.0.0-4.0.7'}], 'defaultStatus': 'unaffected'}] Added Description A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red Added CWE CWE-284 Added Reference https://www.icagenda.com/