CVE-2026-77139Path Traversal in extension "Mask" (mask)
Updated under an hour ago ()
Does this affect you?
It affects TYPO3 Extension "Mask". Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.0 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-22, CWE-73
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- TYPO3
- NVD analysis
- Deferred
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
TYPO3 Extension "Mask" typo3:extension_mask (from the name) | from 9.0.0 before 9.0.11; before 8.3.12 | CNA record |
References
- https://typo3.org/security/advisory/typo3-ext-sa-2026-017vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.