iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability
icagenda.com — iCagenda extension for Joomla
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.
10.0
1.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (Vulnerable System)
- High
- Integrity (Vulnerable System)
- High
- Availability (Vulnerable System)
- High
- Confidentiality (Subsequent System)
- High
- Integrity (Subsequent System)
- High
- Availability (Subsequent System)
- High
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
- Published
- Jun 20, 2026
- Modified
- Jul 11, 2026
- Added to KEV
- Jul 10, 2026
- Federal patch due
- Jul 13, 2026
CISA required action
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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
3 foundWeaponization
Public repositories whose name or description references CVE-2026-48939, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- shinthink/CVE-2026-48939★ 2
Pre-auth arbitrary file upload RCE exploit for iCagenda Joomla extension < 4.0.8 (CVSS 10.0)
updated Jul 14, 2026
- Polosss/By-Poloss..-..CVE-2026-48939★ 1
iCagenda Unauthenticated File Upload to RCE
updated Jul 14, 2026
- ChiefYoru/CVE-2026-48939_PoC★ 0
iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.
updated Jul 18, 2026
References
Frequently asked questions
What is CVE-2026-48939?
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.
How severe is CVE-2026-48939?
CVE-2026-48939 has a CVSS base score of 10.0 out of 10 (CVSS 4.0).
Is CVE-2026-48939 actively exploited in the wild?
Yes. CVE-2026-48939 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 10, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-48939?
1.5% - meaning FIRST.org's EPSS model estimates a 1.5% probability this vulnerability will be exploited in the wild within 30 days (72% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-48939?
We found 3 public GitHub repositories referencing CVE-2026-48939, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2026-48939?
CVE-2026-48939 is classified under CWE-434 (CWE-434: Unrestricted Upload of File with Dangerous Type).
Cross-checked against
Impactr finds and proves whether CVE-2026-48939 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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