CVE-2026-74239 (GCVE-0-2026-74239)
Vulnerability from cvelistv5 – Published: 2026-09-08 13:20 – Updated: 2026-10-01 15:20
VLAI
EPSS
VEX
Title
XenForo < 2.3.13 Path Traversal via Style Archive Importer on Windows
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:00 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://xenforo.com/community/threads/security-fi… | vendor-advisorypatch |
| https://xenforo.com/community/threads/xenforo-2-3… | release-notes |
| https://bombobombone.github.io/posts/cve-2026-74239/ | technical-description |
| https://github.com/BomboBombone/CVE-2026-74239 | exploit |
| https://www.vulncheck.com/advisories/xenforo-path… | third-party-advisory |
Impacted products
Date Public
2026-09-07 00:00
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