CVE-2025-58915
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the YouTube Showcase 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 vulnerable versions of the YouTube Showcase plugin are affected.
💻 Affected Systems
- YouTube Showcase 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 credentials, take over the WordPress site, deface content, or redirect visitors to malicious sites, potentially compromising the entire web server if combined with other vulnerabilities.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions as authenticated users, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing exploitation.
🎯 Exploit Status
Exploitation requires the ability to inject malicious content into the plugin's input fields, which typically requires some level of access or user interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.5.1 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find YouTube Showcase plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable YouTube Showcase Plugin
WordPressTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate youtube-showcase
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Disable the YouTube Showcase plugin immediately
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > YouTube Showcase version. If version is 3.5.0 or earlier, you are vulnerable.Check Version:
wp plugin get youtube-showcase --field=versionVerify Fix Applied:
After updating, verify plugin version shows 3.5.1 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- JavaScript payloads in input fields
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Malicious script tags in HTTP requests
- Suspicious characters like <script> in URL parameters
SIEM Query:
source="web_server" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=") AND uri="*youtube-showcase*"