CVE-2025-39573
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WP Posts Carousel WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the compromised carousel, their browsers execute the attacker's code. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WP Posts Carousel 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, redirect visitors to malicious sites, or deploy malware to site visitors' browsers.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions as authenticated users, or deface website content.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited. Attackers need contributor-level access or higher to inject malicious scripts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.11 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'WP Posts Carousel' and click 'Update Now'. 4. Verify plugin version is 1.3.11 or higher.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate wp-posts-carousel
Content Security Policy
allImplement CSP headers to restrict script execution
Add to .htaccess: Header set Content-Security-Policy "script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: script-src 'self'");
🧯 If You Can't Patch
- Remove the WP Posts Carousel plugin completely from your WordPress installation
- Implement web application firewall (WAF) rules to block XSS payloads targeting this plugin
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins. If WP Posts Carousel version is 1.3.10 or lower, you are vulnerable.Check Version:
wp plugin get wp-posts-carousel --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.3.11 or higher in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin/admin-ajax.php with script tags
- Multiple failed authentication attempts followed by successful contributor/admin login
Network Indicators:
- Outbound connections to suspicious domains from your WordPress server
- Unusual JavaScript payloads in HTTP requests
SIEM Query:
source="wordpress.log" AND ("wp-posts-carousel" OR "admin-ajax.php") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")