CVE-2026-77139

Path Traversal in extension "Mask" (mask)

State: Published
Severity: 6.0 Medium
Published: Aug 25, 2026
Updated: Aug 25, 2026
Reserved: Aug 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N	TYPO3

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-73 External Control of File Name or Path

Affected Products

Product	Versions
Extension "Mask"TYPO3	9.0.0 to before 9.0.11Affected before 8.3.12Affected

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-017vendor-advisory

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