HIGHVulnerability
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 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.
Properties
- severity
- HIGH
- score
- 7.2
- cve_id
- CVE-2026-74239
- signal_observed_at
- 2026-09-16T21:37:07+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- published_at
- 2026-09-08T14:17:26.750
- last_modified
- 2026-09-11T20:30:32.290
Related Entities (3)
HAS_WEAKNESS (1)
→[Weakness]Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
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