CVE-2026-77131: TYPO3 Extension Syssy - TYPO3 Monitoring & Security Checks

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

When OpenSSL is unavailable on the server, the extension transmits TYPO3 system information in cleartext instead of encrypting it. Exploitation requires the attacker to already be in control of the SYSSY project's API key.

Affected products

• TYPO3 Extension Syssy - TYPO3 Monitoring & Security Checks: before 3.0.6 (fixed in 3.0.6)

Published 2026-08-25. Last modified 2026-08-26.