CVE-2026-35054mediumCWE-79

CVE-2026-35054: medium-severity vulnerability in XenForo

XenForo Stored Cross-Site Scripting via BB Code Rendering

Published · Updated

Follow this CVE+ Monitor XenForo

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.1epss 0.1%
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:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
XenForo · XenForo
Related CVEs — XenForo

In the same product, most dangerous first.

CVE-2026-74239HIGHXenForo < 2.3.13 Path Traversal via Style Archive Importer on WindowsEPSS 0.9%CVE-2026-73309CRITICALXenForo < 2.3.13 Authentication Bypass via OAuth2 Token EndpointEPSS 0.7%CVE-2026-35056HIGHXenForo Remote Code Execution via Authenticated AdminEPSS 0.7%CVE-2026-73314HIGHXenForo < 2.3.13 Signature Verification Bypass via PayPal REST WebhookEPSS 0.7%CVE-2026-73321HIGHXenForo < 2.3.13 Uncontrolled Recursion DoS via BBCode ParserEPSS 0.6%CVE-2026-73313HIGHXenForo < 2.3.13 MFA Bypass via Passkey TFA ProviderEPSS 0.6%