Description
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.
Published: 2026-04-01
Score: 5.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 01 Apr 2026 02:15:00 +0000

Type Values Removed Values Added
Description 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.
Title XenForo Cross-Site Scripting via Lightbox in Posts
First Time appeared Xenforo
Xenforo xenforo
Weaknesses CWE-79
CPEs cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*
Vendors & Products Xenforo
Xenforo xenforo
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Subscriptions

Xenforo Xenforo
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-01T15:51:58.760Z

Reserved: 2026-04-01T00:19:59.194Z

Link: CVE-2026-35055

cve-icon Vulnrichment

Updated: 2026-04-01T14:55:19.525Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-01T01:16:41.397

Modified: 2026-04-01T18:55:13.727

Link: CVE-2026-35055

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses