What’s Vulnerable › Vulnerabilities

CVE-2026-48939: iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-07-10
• EPSS: 20.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-20 · updated 2026-10-25
• Weakness: CWE-434

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 products

• icagenda.com iCagenda extension for Joomla: from 3.2.1 before 3.9.15; from 4.0.0 before 4.0.8 — fixed in 3.9.15, 4.0.8

How to fix

Upgrade to a fixed version: icagenda.com iCagenda extension for Joomla 3.9.15, 4.0.8. Check the vendor advisory for mitigations.

References

• https://www.icagenda.com/
• https://github.com/Polosss/By-Poloss..-..CVE-2026-48939
• https://mysites.guru/blog/icagenda-zero-day-file-upload-rce/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48939
• https://www.icagenda.com/docs/changelog/icagenda-3-9-15
• https://www.icagenda.com/docs/changelog/icagenda-4-0-8

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