CVE-2025-13893
📋 TL;DR
The Lesson Plan Book WordPress plugin has a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts via crafted URLs. This affects all WordPress sites using the plugin version 1.3 or earlier. Attackers can steal session cookies, redirect users, or perform actions on their behalf by tricking them into clicking malicious links.
💻 Affected Systems
- WordPress Lesson Plan Book Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain administrative access to WordPress, install backdoors, deface websites, or exfiltrate sensitive data.
Likely Case
Attackers steal user session cookies, redirect users to phishing sites, or perform limited actions within the user's current session.
If Mitigated
With proper web application firewalls and browser security controls, malicious scripts may be blocked or sanitized before execution.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly weaponized in phishing campaigns and require minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Lesson Plan Book' and check for updates. 4. If update available, click 'Update Now'. 5. If no update available, deactivate and delete the plugin.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock requests containing malicious script patterns in the PHP_SELF parameter
Content Security Policy
allImplement CSP headers to restrict script execution sources
Header set Content-Security-Policy "script-src 'self'" in .htaccess or web server config
🧯 If You Can't Patch
- Deactivate the Lesson Plan Book plugin immediately
- Implement strict Content Security Policy headers to mitigate script injection
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Lesson Plan Book version. If version is 1.3 or earlier, you are vulnerable.Check Version:
wp plugin list --name='lesson-plan-book' --field=version (if WP-CLI installed)Verify Fix Applied:
After updating, verify plugin version shows 1.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual GET requests containing script tags in URL parameters
- Multiple 404 errors for lesson.php with suspicious parameters
Network Indicators:
- HTTP requests with JavaScript payloads in URL parameters
- Outbound connections to suspicious domains after visiting lesson.php pages
SIEM Query:
source="web_logs" AND uri="*lesson.php*" AND (uri="*<script*" OR uri="*javascript:*" OR uri="*onerror=*" OR uri="*onload=*")🔗 References
- https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L1776
- https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L1910
- https://plugins.trac.wordpress.org/browser/lesson-plan-book/trunk/lesson.php#L719
- https://www.wordfence.com/threat-intel/vulnerabilities/id/18696937-5cc5-4e14-940d-fc25468377a3?source=cve
