Broken Access Control in extension "Telephone Directory" (telephonedirectory)
Priority MEDIUM 44CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00406 35th percentileScored 2026-11-07
Fix Fixed Extension "Telephone Directory" (TYPO3): 6.2.0, 5.0.1, 4.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TYPO3 | Extension "Telephone Directory" | 6.0.0 to before 6.2.0; 5.0.0 to before 5.0.1; before 4.1.1 | 6.2.0, 5.0.1, 4.1.1 | Patch available | CNA |
- Extension "Telephone Directory" VendorTYPO3 Affected 6.0.0 to before 6.2.0; 5.0.0 to before 5.0.1; before 4.1.1 Fixed in 6.2.0, 5.0.1, 4.1.1 Patch available CNA
Remediation
- Fix · CNA Extension "Telephone Directory" (TYPO3) Fixed in 6.2.0, 5.0.1, 4.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-77140
- 2026-10-03 Alias added: GHSA-q34j-6h38-m895
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-2026-77140 · CVE Program
- CVE-2026-77140 · NVD
- FIRST EPSS
- GHSA-q34j-6h38-m895 · GitHub Advisory Database · CC BY 4.0
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