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Vulnerabilities

CVE-2026-35054

Medium
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 u
CWE-79 — Weakness Type
Published: Apr 1, 2026  ·  Modified: Apr 3, 2026  ·  Source: NVD
CVSS v3
6.4
🔗 NVD Official
📄 Description (English)

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.

🤖 AI Executive Summary

XenForo versions before 2.3.9 contain a stored XSS vulnerability in BB code rendering that allows attackers to inject malicious scripts. These scripts execute when other users view the affected content, potentially compromising user sessions and data.

📄 Description (Arabic)

تؤثر هذه الثغرة على منصات XenForo المستخدمة في المنتديات والمجتمعات عبر الإنترنت. يمكن للمهاجمين استخدام رموز BB المصنعة لتنفيذ كود JavaScript في متصفحات المستخدمين الآخرين. قد يؤدي هذا إلى سرقة الجلسات والبيانات الحساسة والتحكم في الحسابات.

🤖 ملخص تنفيذي (AI)

إصدارات XenForo السابقة للإصدار 2.3.9 تحتوي على ثغرة XSS مخزنة في معالجة رموز BB التي تسمح للمهاجمين بحقن نصوص برمجية ضارة. تُنفذ هذه النصوص عند عرض المستخدمين الآخرين للمحتوى المتأثر.

🤖 AI Intelligence Analysis Analyzed: May 16, 2026 09:37
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: medium
🏢 Affected Saudi Sectors
government telecom
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
6.0
/ 10.0
🔧 Remediation Steps (English)
Immediately upgrade XenForo to version 2.3.9 or later. Review and validate all BB code input handling mechanisms. Implement Content Security Policy (CSP) headers to mitigate XSS impact. Audit user-generated content for malicious scripts and sanitize existing stored data.
🔧 خطوات المعالجة (العربية)
قم بترقية XenForo فوراً إلى الإصدار 2.3.9 أو أحدث. راجع آليات معالجة إدخال رموز BB وتحققها. طبق رؤوس سياسة أمان المحتوى (CSP) للتخفيف من تأثير XSS. قم بتدقيق المحتوى الذي ينشئه المستخدمون بحثاً عن نصوص برمجية ضارة وتطهير البيانات المخزنة الموجودة.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 A.14.2.1
🔵 SAMA CSF
ID.RA-1 PR.DS-1 PR.IP-1
🟡 ISO 27001:2022
A.6.2.1 A.14.2.1 A.14.2.5
📦 Affected Products / CPE 1 entries
xenforo:xenforo
📊 CVSS Score
6.4
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeC — Changed
ConfidentialityL — Low / Local
IntegrityL — Low / Local
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score6.4
CWECWE-79
EPSS0.03%
Exploit No
Patch ✗ No
Published 2026-04-01
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
6.0
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
CWE-79
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