CVE-2025-31570

7.1 HIGH

📋 TL;DR

A Cross-Site Request Forgery (CSRF) vulnerability in the wp-buy Related Posts Widget with Thumbnails WordPress plugin allows attackers to perform stored cross-site scripting (XSS) attacks. This affects WordPress sites using the plugin versions up to 1.2. Attackers can inject malicious scripts that execute when users visit affected pages.

💻 Affected Systems

Products:
  • wp-buy Related Posts Widget with Thumbnails (WordPress plugin)
Versions: n/a through 1.2
Operating Systems: All operating systems running WordPress
Default Config Vulnerable: ⚠️ Yes
Notes: Only affects WordPress installations with the vulnerable plugin activated. The plugin must be installed and active for exploitation.

⚠️ 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.

Recommended Actions:
  1. Review the CVE details at NVD
  2. Check vendor security advisories for your specific version
  3. Test if the vulnerability is exploitable in your environment
  4. Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could inject malicious JavaScript that steals admin credentials, redirects users to malicious sites, or performs administrative actions on behalf of users, potentially leading to complete site compromise.

🟠

Likely Case

Attackers inject malicious scripts that display unwanted content, redirect users to spam sites, or steal session cookies from logged-in users.

🟢

If Mitigated

With proper CSRF protections and content security policies, the attack surface is reduced, though the vulnerability still exists in the plugin code.

🌐 Internet-Facing: HIGH
🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ✅ No
Complexity: MEDIUM

Exploitation requires tricking an authenticated user (typically an admin) into visiting a malicious page while logged in. The CSRF leads to stored XSS payload injection.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Version after 1.2 (check plugin repository for latest)

Vendor Advisory: https://patchstack.com/database/wordpress/plugin/advanced-css3-related-posts-widget/vulnerability/wordpress-related-posts-widget-with-thumbnails-plugin-1-2-csrf-to-stored-xss-vulnerability?_s_id=cve

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Related Posts Widget with Thumbnails'. 4. Click 'Update Now' if available, or delete and install latest version from WordPress repository.

🔧 Temporary Workarounds

Disable Plugin

all

Temporarily deactivate the vulnerable plugin until patched

Implement CSRF Tokens

all

Add CSRF protection to WordPress forms if custom implementation is possible

🧯 If You Can't Patch

  • Remove the plugin entirely and use alternative related posts functionality
  • Implement strict Content Security Policy (CSP) headers to mitigate XSS impact

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin > Plugins > Installed Plugins for 'Related Posts Widget with Thumbnails' version 1.2 or earlier

Check Version:

wp plugin list --name='related-posts-widget-with-thumbnails' --field=version (if WP-CLI installed)

Verify Fix Applied:

Verify plugin version is updated to latest (after 1.2) in WordPress admin plugins page

📡 Detection & Monitoring

Log Indicators:

  • Unusual POST requests to wp-admin/admin-ajax.php or plugin-specific endpoints
  • JavaScript injection in database content related to posts/widgets

Network Indicators:

  • CSRF attack patterns with missing referrer headers or nonce validation

SIEM Query:

source="wordpress" AND (uri_path="*admin-ajax.php*" OR plugin="related-posts-widget-with-thumbnails") AND status=200

🔗 References

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