What’s Vulnerable › Vulnerabilities
CVE-2026-77139: Path Traversal in extension "Mask" (mask)
- Severity: medium (CVSS 6.0 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-25 · updated 2026-09-28
- Weakness: CWE-22
Description
The extension fails to validate a client-supplied template element key before using it to build file paths for saving and deleting Mask template files. An authenticated backend user with access to the Mask module can supply a key containing path traversal sequences to create or delete .html files outside the configured template directory.
Affected products
- TYPO3 Extension "Mask": from 9.0.0 before 9.0.11; before 8.3.12 — fixed in 8.3.12, 9.0.11
How to fix
Upgrade to a fixed version: TYPO3 Extension "Mask" 8.3.12, 9.0.11. Check the vendor advisory for mitigations.
References
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