CVE-2025-39420
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WP Twitter Button WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the malicious content, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using WP Twitter Button version 1.4.1 or earlier are affected.
💻 Affected Systems
- WP Twitter Button 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, deface websites, redirect visitors to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers inject malicious JavaScript that steals user session cookies or credentials when visitors view compromised pages, potentially leading to account compromise.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing exploitation.
🎯 Exploit Status
Stored XSS vulnerabilities in WordPress plugins are commonly exploited. While no public PoC is confirmed, similar vulnerabilities are frequently weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WP Twitter Button. 4. Click 'Update Now' if available. 5. Alternatively, delete and reinstall latest version from WordPress repository.
🔧 Temporary Workarounds
Disable WP Twitter Button plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate wp-twitter-button
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WP Twitter Button versionCheck Version:
wp plugin get wp-twitter-button --field=versionVerify Fix Applied:
Verify WP Twitter Button version is 1.4.2 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin admin pages
- JavaScript payloads in form submissions
- Multiple failed XSS attempts
Network Indicators:
- Malicious script tags in HTTP requests
- Suspicious JavaScript in POST parameters
SIEM Query:
source="wordpress.log" AND "wp-twitter-button" AND ("script" OR "javascript" OR "onerror" OR "onload")