EUVD-2026-17739
GHSA-2ch2-j7qp-pqm3
5.1
CVSS 4.0
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CVSS Vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
P
Scope
X
Lifecycle Timeline
3
Analysis Generated
Apr 01, 2026 - 01:15 vuln.today
EUVD ID Assigned
Apr 01, 2026 - 01:15 euvd
EUVD-2026-17739
CVE Published
Apr 01, 2026 - 00:30 nvd
MEDIUM 5.1
Tags
Description
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.
Analysis
Stored cross-site scripting in XenForo before version 2.3.9 allows authenticated users to inject malicious scripts through BB code that persist in the application and execute when other users view the affected content. The vulnerability requires user interaction (viewing the malicious post) and authenticated access to create content, limiting its scope but enabling account compromise and session hijacking of affected users.
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Priority Score
26
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: 0
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