CVE-2025-23864
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WCS QR Code Generator WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the injected scripts, the attacker can steal session cookies, redirect users, or perform actions on their behalf. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WCS QR Code Generator 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 could steal administrator session cookies, take over WordPress sites, install backdoors, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before being stored or displayed to users.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited. While no public PoC is mentioned, the vulnerability type is well-understood and easily weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Restart Required: No
Instructions:
1. Check if plugin update is available in WordPress admin panel. 2. If no update, remove the plugin entirely. 3. Consider alternative QR code generator plugins with security updates.
🔧 Temporary Workarounds
Disable or Remove Plugin
allCompletely remove the vulnerable plugin from your WordPress installation
wp plugin deactivate wcs-qr-code-generator
wp plugin delete wcs-qr-code-generator
Implement Web Application Firewall
allDeploy a WAF with XSS protection rules to block exploitation attempts
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to limit script execution
- Enable WordPress security plugins with XSS protection features
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins page for WCS QR Code Generator version. If version is 1.0 or earlier, you are vulnerable.Check Version:
wp plugin list --name=wcs-qr-code-generator --field=versionVerify Fix Applied:
Verify the plugin is either updated to a patched version (if available) or completely removed from the plugins directory.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- Suspicious JavaScript in QR code parameter values
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Malicious script tags in HTTP requests to plugin endpoints
- Suspicious parameter values containing JavaScript in URLs
SIEM Query:
source="web_server" AND (uri="*wcs-qr-code-generator*" OR uri="*qr-code*" OR plugin="wcs-qr-code-generator") AND (param="*<script*" OR param="*javascript:*" OR param="*onload=*" OR param="*onerror=*")