CVE-2025-49064
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the User Language Switch WordPress plugin. When a user visits a specially crafted URL, the script executes in their browser, potentially stealing session cookies or performing actions on their behalf. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress User Language Switch 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, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers steal user session cookies or credentials through phishing links, potentially compromising individual user accounts.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited through phishing links and require minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.11 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'User Language Switch' and click 'Update Now'. 4. Verify update to version 1.6.11 or later.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the User Language Switch plugin until patched
wp plugin deactivate user-language-switch
Implement WAF rules
allAdd web application firewall rules to block XSS payloads
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block reflected XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → User Language Switch versionCheck Version:
wp plugin get user-language-switch --field=versionVerify Fix Applied:
Confirm plugin version is 1.6.11 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual GET requests with script tags in parameters
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests containing <script> tags or javascript: URIs in query parameters
SIEM Query:
source="web_server" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")