HIGH 8.6 NVD
CVE-2026-74239
XenForo before 2.3.13 contains a path traversal vulnerability in the style archive importer on Windows deployments that allows authenticated non-super administr
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.
Affected Products
- xenforo/xenforo
References
- https://bombobombone.github.io/posts/cve-2026-74239/
- https://github.com/BomboBombone/CVE-2026-74239
- https://www.vulncheck.com/advisories/xenforo-path-traversal-via-style-archive-importer-on-
- https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-ga
- https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-securit
This high severity vulnerability with a CVSS score of 8.6 was published on 2026-09-08 via NVD. Affected: xenforo/xenforo.
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