CVE-2026-74239
highXenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administ…
Vendor / product: Xenforo — xenforo
XenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administrators with style permissions to write arbitrary files outside the intended extraction directory by using backslash-based traversal sequences in ZIP member names. Attackers can craft a malicious ZIP archive with backslash path separators that bypass forward-slash validation to write arbitrary bytes to any web-server-writable path, including the public web root, achieving persistent code execution as the web-server account.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://bombobombone.github.io/posts/cve-2026-74239/ disclosure@vulncheck.com
- https://github.com/BomboBombone/CVE-2026-74239 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/xenforo-path-traversal-via-style-archive-importer-on-... disclosure@vulncheck.com
- https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-ga... disclosure@vulncheck.com
- https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-securit... disclosure@vulncheck.com