CVE-2025-26884
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Greenshift WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. It affects all WordPress sites running Greenshift plugin versions up to 10.8. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Greenshift - Animation and Page Builder Blocks
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, take over WordPress sites, install backdoors, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized before execution, preventing any impact.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited. The Patchstack advisory provides technical details that could be used to create exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.9 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Greenshift plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 10.9+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Greenshift Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate greenshift-animation-and-page-builder-blocks
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to WordPress functions.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Restrict plugin access to trusted users only and monitor for suspicious content
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Greenshift version. If version is 10.8 or lower, you are vulnerable.Check Version:
wp plugin get greenshift-animation-and-page-builder-blocks --field=versionVerify Fix Applied:
After updating, verify Greenshift plugin shows version 10.9 or higher in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Greenshift endpoints
- Suspicious JavaScript in database content fields
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Malicious script tags in HTTP requests to Greenshift endpoints
- Unexpected external script loads from Greenshift pages
SIEM Query:
source="web_server" AND (uri="*greenshift*" OR user_agent="*greenshift*") AND (message="*<script>*" OR message="*javascript:*" OR message="*onload=*" OR message="*onerror=*")