Is CVE-2026-35057 actively exploited?

CVE-2026-35057 has no public evidence of in-the-wild exploitation as of 2026-04-01.

What is the CVSS score for CVE-2026-35057?

CVE-2026-35057 has a CVSS score of 5.1 (MEDIUM severity). 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.

How do I patch CVE-2026-35057?

Patch guidance is available from xenforo security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-35057.

Which products are affected by CVE-2026-35057?

2 products: xenforo xenforo, xenforo xenforo.

CVE-2026-35057 - remediation guidance & executive summary

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.

CVSS Metrics

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
Complexity: low
Privileges: low
User Action: passive
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: XENFORO
Published: 4/1/2026
Last Modified: 4/1/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-35057

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary