CVE-2026-48939Joomla Extension - icagenda.com - Remote Code Execution in iCaganda extension for Joomla < 4.0.8/3.9.15
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 10.0 | CRITICAL | 4.0Joomla (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red |
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CISA required action
⚡ Known exploited · remediation due Jul 13, 2026
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.
Details
- CVE ID
- CVE-2026-48939
- Status
- Analyzed
- Assigner (CNA)
- Joomla
- Published
- Jun 20, 2026
- Last modified
- 2026-10-25 23:10 UTC
- Weaknesses
- CWE-434 · Unrestricted Upload of File with Dangerous Type
Affected Products
As published by the CNA in the CVE record.
icagenda.comiCagenda extension for Joomla1 version range
- 3.2.1-4.0.7
References
- icagenda.com https://www.icagenda.com/
- github.com https://github.com/Polosss/By-Poloss..-..CVE-2026-48939
- mysites.guru https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939
- icagenda.com https://www.icagenda.com/docs/changelog/icagenda-3-9-15
- icagenda.com https://www.icagenda.com/docs/changelog/icagenda-4-0-8