CVE-2026-35055
mediumpriority · track · 0EPSS 0.002 · 5 %ileEUUSEPSS · scored 2026-10-28
XenForo before 2.3.9 and before 2.2.18 is vulnerable to cross-site scripting (XSS) related to lightbox usage in posts. An attacker can inject malicious scripts that execute when users interact with post content displayed in the lightbox.
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 · 1.2–6.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
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-cross-site-scripting-via-lightbox-in-postscnnvd
- 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-cross-site-scripting-via-lightbox-in-postsenisa_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-cross-site-scripting-via-lightbox-in-postsThird 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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