📄 Description (English)
The Post Flagger plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'flag' shortcode in all versions up to, and including, 1.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
🤖 AI Executive Summary
The Post Flagger WordPress plugin contains a Stored Cross-Site Scripting (XSS) vulnerability in its 'flag' shortcode that allows authenticated contributors and above to inject malicious scripts. With no patch currently available and no public exploit, this poses a moderate risk to WordPress installations in Saudi Arabia. Organizations using this plugin should immediately implement compensating controls and monitor for exploitation attempts.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 15, 2026 17:08
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily affects Saudi organizations using WordPress for content management, including government agencies, educational institutions, media organizations, and small-to-medium enterprises. Government entities under NCA oversight and organizations subject to SAMA regulations face elevated risk if they rely on this plugin. The threat is limited to authenticated users with contributor access or higher, reducing the attack surface but requiring vigilant access control management. Healthcare and financial sector WordPress implementations are at particular risk due to sensitivity of hosted content.
🏢 Affected Saudi Sectors
Government
Education
Media and Publishing
Small and Medium Enterprises
Healthcare
Financial Services
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Audit all WordPress installations to identify Post Flagger plugin usage and version numbers
2. Review user access logs for contributor-level and above accounts, particularly for suspicious shortcode modifications
3. Disable the Post Flagger plugin immediately if not critical to operations
Compensating Controls (until patch available):
1. Restrict contributor-level access to only trusted personnel; audit and remove unnecessary accounts
2. Implement Web Application Firewall (WAF) rules to detect and block shortcode injection patterns
3. Enable WordPress security plugins (e.g., Wordfence, Sucuri) with XSS detection capabilities
4. Apply Content Security Policy (CSP) headers to prevent inline script execution
5. Implement strict input validation on all user-supplied shortcode attributes
Detection Rules:
1. Monitor for modifications to posts/pages containing 'flag' shortcode with suspicious attributes
2. Alert on script tags or event handlers within shortcode parameters
3. Log all contributor-level and above user activities, particularly content modifications
4. Search WordPress database for patterns: [flag.*script|[flag.*on[a-z]+= in post_content
Patching Guidance:
1. Contact plugin developer for security update timeline
2. Prepare for immediate plugin update upon release
3. Test updates in staging environment before production deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تدقيق جميع تثبيتات WordPress لتحديد استخدام مكون Post Flagger وأرقام الإصدارات
2. مراجعة سجلات الوصول للمستخدمين على مستوى المساهم وما فوقه، خاصة للتعديلات المريبة على الاختصارات
3. تعطيل مكون Post Flagger فوراً إذا لم يكن حرجاً للعمليات
الضوابط التعويضية (حتى توفر التصحيح):
1. تقييد الوصول على مستوى المساهم للموظفين الموثوقين فقط؛ تدقيق وإزالة الحسابات غير الضرورية
2. تنفيذ قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن أنماط حقن الاختصارات وحجبها
3. تفعيل مكونات أمان WordPress (مثل Wordfence و Sucuri) مع قدرات كشف XSS
4. تطبيق رؤوس سياسة أمان المحتوى (CSP) لمنع تنفيذ النصوص البرمجية المضمنة
5. تنفيذ التحقق الصارم من المدخلات على جميع سمات الاختصارات المزودة من قبل المستخدم
قواعد الكشف:
1. مراقبة التعديلات على المنشورات/الصفحات التي تحتوي على اختصار 'flag' مع سمات مريبة
2. التنبيه على علامات النصوص البرمجية أو معالجات الأحداث ضمن معاملات الاختصار
3. تسجيل جميع أنشطة المستخدمين على مستوى المساهم وما فوقه، خاصة تعديلات المحتوى
4. البحث في قاعدة بيانات WordPress عن الأنماط: [flag.*script|[flag.*on[a-z]+=
إرشادات التصحيح:
1. التواصل مع مطور المكون لمعرفة جدول زمني لتحديث الأمان
2. الاستعداد لتحديث المكون الفوري عند الإصدار
3. اختبار التحديثات في بيئة التجريب قبل نشرها في الإنتاج
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.14.2.1 - Secure development policy (input validation and output encoding requirements)
A.14.2.5 - Secure development environment
A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.SC-7 - Software, firmware, and information integrity checks
PR.DS-6 - Integrity checking mechanisms
DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
A.14.2.1 - Secure development policy
A.14.2.4 - Secure system engineering principles
A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
6.5.7 - Cross-site scripting (XSS)
6.2 - Ensure security patches are installed
🔗 References & Sources 4
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https://plugins.trac.wordpress.org/browser/post-flagger/tags/1.1/post-flagger.php#L66
security@wordfence.com
https://plugins.trac.wordpress.org/browser/post-flagger/trunk/post-flagger.php#L66
security@wordfence.com
https://wordpress.org/plugins/post-flagger/
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/1653e5a9-d2bb-42e3-be0d-27356...
security@wordfence.com