CVE-2026-77131: CWE-319 Cleartext Transmission of Sensitive Information in TYPO3 Extension "SYSSY - TYPO3 Monitoring & Security Checks"
Description
The TYPO3 extension "SYSSY - TYPO3 Monitoring & Security Checks" transmits system information in cleartext when OpenSSL is unavailable on the server. This vulnerability requires the attacker to already have control of the SYSSY project's API key to exploit. It affects versions from 0 up to but not including 3.0.6. The CVSS 4.0 base score is 5.3, indicating a medium severity risk.
CVSS v4.0
Score 5.3medium
Affected software
TYPO3
Extension "SYSSY - TYPO3 Monitoring & Security Checks"
pkg:composer/syssy/syssy-typo3-extensionRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-77131 describes a cleartext transmission vulnerability (CWE-319) in the TYPO3 extension "SYSSY - TYPO3 Monitoring & Security Checks." When OpenSSL is not present on the server, the extension fails to encrypt TYPO3 system information, sending it in cleartext. Exploitation requires possession of the SYSSY project's API key, implying that an attacker must already have some level of access or control. The vulnerability affects all versions from 0 up to but excluding 3.0.6.
Potential Impact
Sensitive TYPO3 system information can be intercepted in cleartext during transmission if OpenSSL is unavailable, potentially exposing system details to unauthorized parties. However, exploitation requires the attacker to already control the SYSSY project's API key, limiting the attack surface. The vulnerability has a medium severity rating with a CVSS 4.0 score of 5.3.
Mitigation Recommendations
Upgrade the TYPO3 extension "SYSSY - TYPO3 Monitoring & Security Checks" to version 3.0.6 or later, where this issue is resolved. Ensure OpenSSL is available and properly configured on the server to enable encryption of transmitted data. Since no official patch links were provided, verify with the vendor for the latest updates and remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TYPO3
- Date Reserved
- 2026-08-20T13:10:12.062Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8d5b64acd9273b49f36592
Added to database: 08/25/2026, 09:07:48 UTC
Last enriched: 09/10/2026, 20:17:34 UTC
Last updated: 10/09/2026, 06:48:19 UTC
Views: 69
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