CVE-2026-35054
mediumpriority · track · 22EPSS 0.001 · 3 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–6.4
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-renderingcnnvd
- https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/cnnvd
- https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-renderingenisa_euvd
- https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/enisa_euvd
- https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-renderingThird Party Advisorynvd
- https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/Release Notesnvd
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