CVE-2025-31900
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Lexicata WordPress plugin. When users visit a specially crafted URL, their browsers execute the attacker's code, potentially stealing session cookies or redirecting to malicious sites. All WordPress sites running Lexicata plugin versions up to 1.0.16 are affected.
💻 Affected Systems
- Lexicata WordPress 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 full control of WordPress site, install backdoors, deface website, or pivot to internal network.
Likely Case
Attackers steal user session cookies, redirect visitors to phishing pages, or perform actions on behalf of authenticated users.
If Mitigated
Limited impact with proper Content Security Policy (CSP) headers and input validation, though basic XSS protection may still be bypassed.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking malicious link), but exploitation is straightforward with publicly available techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.17 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Lexicata plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF)
allConfigure WAF rules to block XSS payloads in URL parameters
Add Content Security Policy
allImplement CSP headers to restrict script execution sources
Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Header set X-Content-Type-Options "nosniff"
🧯 If You Can't Patch
- Disable Lexicata plugin immediately via WordPress admin or by renaming plugin directory
- Implement strict input validation and output encoding for all user-controlled parameters
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Lexicata version. If version is 1.0.16 or earlier, you are vulnerable.Check Version:
wp plugin list --name=lexicata --field=versionVerify Fix Applied:
After update, verify Lexicata version shows 1.0.17 or later in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual long URLs with script tags in access logs
- Multiple failed requests to Lexicata endpoints with encoded payloads
Network Indicators:
- HTTP requests containing <script>, javascript:, or encoded equivalents in query parameters
SIEM Query:
source="web_access_logs" AND (uri="*<script>*" OR uri="*javascript:*" OR uri="*%3Cscript%3E*") AND uri="*lexicata*"