XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 1, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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.

Affected

• cpe xenforo/xenforoversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-35054

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-35054

  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.

  nvd.nist.gov

References

• Third Party Advisory · vulncheck.com
• Release Notes · xenforo.com