XSS in Xenforo
CVE-2023-53904
Xenforo 2.2.13 contains a stored cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts through the smilie category title parameter. Attackers can create a smilie category with a malicious script that will execute when the admin panel is loaded, potentially enabling further client-side attacks.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (13.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
Affected products
- Xenforo — versions 2.2.13
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2023-53904?
- CVE-2023-53904 is a medium-severity vulnerability in Xenforo, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-12-17.
- How severe is CVE-2023-53904?
- Medium severity. CVSS v3 base score is 4.6 out of 10.