CVE-2026-35057

XenForo Stored Cross-Site Scripting via Structured Text Mentions

State: Published
Severity: 5.1 Medium
Published: Apr 1, 2026
Updated: May 24, 2026
Reserved: Apr 1, 2026

Description

XenForo before 2.3.10 and before 2.2.19 is vulnerable to stored cross-site scripting (XSS) in structured text mentions, primarily affecting legacy profile post content. An attacker can inject malicious scripts through crafted mentions that are stored and executed when other users view the content.

Scores

CVSS	Score	Vector	Source
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	VulnCheck
3.1	6.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
XenForoXenForo	2.3.0 to before 2.3.10Affected before 2.2.19Affected

References

XenForo 2.3.10 & Add-ons and 2.2.19 Released (Includes Security Fix)vendor-advisorypatch
XenForo 2.x Stored XSS via Placeholder Collision PoCexploit

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.