CVE-2025-39525
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WordPress Logo Carousel Slider plugin allows attackers to inject malicious scripts that execute when other users view affected pages. All WordPress sites using vulnerable versions of this plugin are affected. The vulnerability enables attackers to steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- WordPress Logo Carousel Slider 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 the WordPress site, install backdoors, deface the site, or use it as a platform for further attacks against visitors.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, redirect visitors to phishing sites, or display unwanted content/advertisements.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing any impact.
🎯 Exploit Status
The vulnerability requires contributor-level or higher access to inject malicious scripts, but once stored, they execute for all users viewing the affected page. Public proof-of-concept details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Logo Carousel Slider' and click 'Update Now'. 4. Alternatively, download version 2.1.4+ from WordPress.org and replace the plugin files manually.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the Logo Carousel Slider plugin until patched
wp plugin deactivate logo-carousel-slider
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
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 Logo Carousel Slider plugin completely and use alternative carousel solutions
- Restrict user roles that can edit logo carousel content to trusted administrators only
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Logo Carousel Slider version. If version is 2.1.3 or lower, you are vulnerable.Check Version:
wp plugin get logo-carousel-slider --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 2.1.4 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to logo carousel endpoints
- Suspicious JavaScript payloads in POST data
- Multiple failed authentication attempts followed by successful contributor/admin login
Network Indicators:
- External domains loading scripts from your WordPress site unexpectedly
- Suspicious outbound connections after page loads
SIEM Query:
source="wordpress.log" AND ("logo-carousel" OR "wp_logo_carousel") AND (POST OR PUT) AND ("script" OR "javascript" OR "onload" OR "onerror")