CVEs / CVE-2026-48939
CVE-2026-48939: iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability
- Known exploited in the CISA KEV catalog since 10 Jul 2026
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 20% chance of exploitation in the next 30 days, higher than 97% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| icagenda.com iCagenda extension for Joomla | 3.2.1-4.0.7 | — |
Exploitation
| In CISA KEV since | 10 Jul 2026 |
|---|---|
| Due date for US federal agencies | 13 Jul 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-434 |
References
- CVE-2026-48939 on NVD
- CVE-2026-48939 in the CISA KEV catalog
- https://www.icagenda.com/#download (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- 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
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.