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CVE-2026-74239

7.2 · HIGH

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…

Published Sep 8, 2026xenforoCWE-22EPSS 0.89%

Overview

CVE-2026-74239 is a high-severity vulnerability affecting xenforo xenforo. It was published on September 8, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from xenforo. Update xenforo to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
xenforoxenforo>= 0, < 2.3.13Affected

References

Refbombobombone.github.io/posts/cve-2026-74239/GitHubgithub.com/BomboBombone/CVE-2026-74239Refwww.vulncheck.com/advisories/xenforo-path-traversal-via-style-archive-importer-on-windowsRefxenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-gallery-versions-2-2-0-2-3-12.239856/Refxenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-security-fixes.239857/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74239?

CVE-2026-74239 is a high-severity vulnerability affecting xenforo xenforo. It was published on September 8, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).

How severe is CVE-2026-74239?

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-74239?

Check the references section for vendor advisories and patches from xenforo. Update xenforo to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-74239?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74239 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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