CVE-2026-35054

5.1 mediumEPSS 0.1%

Medium (5.1) in xenforo xenforo. EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.1 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

5.4 medium

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-04-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

xenforo:xenforo

References

https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering
https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/

Check your stack JSON