CVE-2025-11857
📋 TL;DR
The XX2WP Integration Tools WordPress plugin has a stored XSS vulnerability in the 'mxp_fb2wp_display_embed' shortcode. Authenticated attackers with contributor-level access or higher can inject malicious scripts that execute when users view compromised pages. This affects all versions up to and including 1.9.9.
💻 Affected Systems
- XX2WP Integration Tools 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, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor access inject malicious scripts to steal user session cookies or perform phishing attacks against site visitors.
If Mitigated
With proper input validation and output escaping, the vulnerability is eliminated and no exploitation occurs.
🎯 Exploit Status
Exploitation requires authenticated access at contributor level or higher. The vulnerability is in the 'post_id' parameter of the 'mxp_fb2wp_display_embed' shortcode.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.9.9
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'XX2WP Integration Tools'. 4. Click 'Update Now' if update is available. 5. Alternatively, download latest version from WordPress plugin repository and replace files manually.
🔧 Temporary Workarounds
Disable vulnerable shortcode
allRemove or disable the 'mxp_fb2wp_display_embed' shortcode functionality
Edit plugin files to comment out or remove shortcode registration
Restrict user roles
allLimit contributor-level access to trusted users only
🧯 If You Can't Patch
- Disable the XX2WP Integration Tools plugin entirely
- Implement web application firewall rules to block suspicious post_id parameter values
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for XX2WP Integration Tools version 1.9.9 or earlierCheck Version:
wp plugin list --name=fb2wp-integration-tools --field=versionVerify Fix Applied:
Verify plugin version is higher than 1.9.9 and check that the 'post_id' parameter in 'mxp_fb2wp_display_embed' shortcode now has proper sanitization📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin with post_id parameter containing script tags
- Multiple failed authentication attempts followed by successful contributor login
Network Indicators:
- HTTP requests containing malicious script payloads in post_id parameter
- Outbound connections to suspicious domains from WordPress site
SIEM Query:
source="wordpress.log" AND ("mxp_fb2wp_display_embed" OR "post_id") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")🔗 References
- https://plugins.trac.wordpress.org/browser/fb2wp-integration-tools/tags/1.9.9/index.php#L302
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3379625%40fb2wp-integration-tools&new=3379625%40fb2wp-integration-tools&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5cbb28e2-a7a1-4e33-93e5-872d6f2e00ec?source=cve
