Cleartext Transmission of Sensitive Information in extension "SYSSY - TYPO3 Monitoring & Security Checks" (syssy)
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-319.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Extension "SYSSY - TYPO3 Monitoring & Security Checks" (TYPO3) Fixed in 3.0.6
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
TYPO3 Extension "SYSSY - TYPO3 Monitoring & Security Checks" — typo3.org/security/advisory/typo3-ext-sa-2026-015
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-53873 Insufficient Session Expiration in extension "SYSSY - TYPO3 Monitoring & Security Checks" (syssy)Priority LOW 24
Timeline
- 2026-10-02 Threatist record created from CVE-2026-77131
- 2026-10-03 Alias added: GHSA-8j7q-247m-7f82
References
More TYPO3 vulnerabilities
- TI-2023-10314 Persisted Cross-Site Scripting in Frontend Rendering in typo3 CVSS 3.1HIGH 8.8
- TI-2010-03538 The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3… CVSS 2.0HIGH 7.1
- TI-2009-00775 The jumpUrl mechanism in class.tslib_fe.php in TYPO3 3.3.x through 3.8.x, 4.0 before… CVSS 2.0MEDIUM 5.0
- TI-2025-30547 The sr_feuser_register extension through 12.4.8 for TYPO3 allows Remote Code Execution. CVSS 3.1CRITICAL 10.0
- TI-2019-08867 The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before… CVSS 3.1CRITICAL 9.8
- TI-2008-04019 Unspecified vulnerability in the TYPO3 Secure Directory (kw_secdir) extension before… CVSS 2.0HIGH 10.0
Sources
- CVE-2026-77131 · CVE Program
- CVE-2026-77131 · NVD
- FIRST EPSS
- GHSA-8j7q-247m-7f82 · GitHub Advisory Database · CC BY 4.0
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