CVE-2026-35054 — MEDIUM (6.4)

Q: How severe is CVE-2026-35054?

CVE-2026-35054 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-35054?

Check the references section above for vendor advisories and patch information. Affected products include: Xenforo Xenforo.

Vulnerability Description

XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering. An attacker can inject malicious scripts through BB code that are stored and executed when other users view the content.

CVSS Score

6.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Xenforo	Xenforo	< 2.3.9

Related Weaknesses (CWE)

CWE-79

References

https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-Third Party Advisory
https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-secRelease Notes

FAQ

What is CVE-2026-35054?

CVE-2026-35054 is a vulnerability with a CVSS score of 6.4 (MEDIUM). XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering. An attacker can inject malicious scripts through BB code that are stored and executed when other u...

How severe is CVE-2026-35054?

CVE-2026-35054 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-35054?

Check the references section above for vendor advisories and patch information. Affected products include: Xenforo Xenforo.