{"id":"CVE-2026-74239","title":"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 ex…","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 ex…","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-22"],"vendor":"xenforo","product":"xenforo","affected":["xenforo < 2.3.13"],"patched":["xenforo 2.3.13"],"published":"2026-09-08","updated":"2026-09-11","sourceUpdated":"2026-09-11T20:30:32.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74239","references":[{"url":"https://bombobombone.github.io/posts/cve-2026-74239/","label":"disclosure@vulncheck.com"},{"url":"https://github.com/BomboBombone/CVE-2026-74239","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/xenforo-path-traversal-via-style-archive-importer-on-windows","label":"disclosure@vulncheck.com"},{"url":"https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-gallery-versions-2-2-0-2-3-12.239856/","label":"disclosure@vulncheck.com"},{"url":"https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-security-fixes.239857/","label":"disclosure@vulncheck.com"}],"tags":["nvd","exploit-available","cve.org"],"epss":0.00695,"epssPercentile":0.51133,"exploits":{"github":1,"githubRepos":["https://github.com/BomboBombone/CVE-2026-74239"],"checkedAt":"2026-09-21T15:30:32.840Z"},"exploitAvailable":true,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-08T14:00:52.670163Z"},"ingestedAt":"2026-09-08T15:33:26.985Z","slug":"CVE-2026-74239","body":"## Overview\n\nXenForo 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.\n\n## Affected\n\n- `xenforo < 2.3.13`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `xenforo 2.3.13`","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":39.6,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":8361,"id":"CVE-2026-74239","ts":1788920417567,"field":"exploit_available","old":"false","new":"true"}]}