CVE-2025-58020
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Theater for WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All WordPress sites running Theater for WordPress plugin versions up to and including 0.18.8 are affected. Attackers can steal session cookies, redirect users, or perform actions on behalf of authenticated users.
💻 Affected Systems
- Theater for WordPress
⚠️ 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 credentials, take over the WordPress site, install backdoors, deface the website, or pivot to attack visitors' systems.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, redirect users to phishing sites, or perform unauthorized actions as authenticated users.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Exploitation requires finding the specific input vector and crafting appropriate payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 0.18.8
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Theater for WordPress'. 4. Click 'Update Now' if available. 5. If no update is available, deactivate and delete the plugin, then install the latest version from WordPress repository.
🔧 Temporary Workarounds
Disable Theater Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate theatre
Implement WAF Rules
allAdd web application firewall rules to block XSS payloads
🧯 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 panel > Plugins > Installed Plugins for Theater for WordPress versionCheck Version:
wp plugin get theatre --field=versionVerify Fix Applied:
Verify plugin version is greater than 0.18.8 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests containing script tags or JavaScript code to Theater plugin endpoints
- Multiple failed login attempts following suspicious plugin activity
Network Indicators:
- HTTP requests containing <script> tags or JavaScript event handlers like onload, onerror
- Outbound connections to suspicious domains from your WordPress site
SIEM Query:
source="wordpress.log" AND ("theatre" OR "theater") AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")