CVE-2026-48939
Joomla Extension - icagenda.com - Remote Code Execution in iCaganda extension for Joomla < 4.0.8/3.9.15
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 10, 2026, 7:12 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
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 2 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).
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
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 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.
-
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/