CVE-2025-57940
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WordPress Append extensions on Pages plugin allows attackers to inject malicious scripts into web pages. When users view affected pages, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress Append extensions on Pages 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 pages, or redirect users to malicious sites.
Likely Case
Attackers inject malicious scripts to steal user session cookies or credentials, potentially compromising user accounts.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users.
🎯 Exploit Status
Requires attacker to have ability to create or edit pages using the plugin's functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.1.2
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Append extensions on Pages'. 4. Click 'Update Now' if available. 5. If no update available, deactivate and remove the plugin.
🔧 Temporary Workarounds
Disable vulnerable plugin
WordPressTemporarily deactivate the Append extensions on Pages plugin until patched version is available
wp plugin deactivate append-extensions-on-pages
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Restrict user permissions to prevent unauthorized page editing
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Append extensions on Pages for version numberCheck Version:
wp plugin get append-extensions-on-pages --field=versionVerify Fix Applied:
Verify plugin version is greater than 1.1.2 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual page edits or content modifications
- Suspicious script tags in page content
Network Indicators:
- Requests containing script injection patterns to WordPress admin endpoints
SIEM Query:
source="wordpress.log" AND ("append-extensions" OR "page edit") AND ("script" OR "javascript:" OR "onerror=")