CVE-2026-2593
📋 TL;DR
The Greenshift WordPress plugin has a stored XSS vulnerability that allows authenticated attackers with Contributor access or higher to inject malicious scripts into pages. These scripts execute when users visit the compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- Greenshift – animation and page builder blocks 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 accounts inject malicious scripts to steal user session cookies or credentials, potentially escalating privileges.
If Mitigated
With proper input validation and output escaping, malicious scripts are neutralized before execution, preventing exploitation.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once attacker has Contributor privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 12.8.6 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Greenshift plugin and click 'Update Now'. 4. Verify update to version 12.8.6 or higher.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the Greenshift plugin until patched to prevent exploitation.
wp plugin deactivate greenshift-animation-and-page-builder-blocks
Restrict User Roles
allTemporarily remove Contributor role access or limit user creation.
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads targeting _gspb_post_css and dynamicAttributes parameters.
- Enable Content Security Policy (CSP) headers to restrict script execution sources and mitigate impact of successful injections.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Greenshift version. If version is 12.8.5 or lower, system is vulnerable.Check Version:
wp plugin get greenshift-animation-and-page-builder-blocks --field=versionVerify Fix Applied:
After update, verify Greenshift plugin shows version 12.8.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin with _gspb_post_css or dynamicAttributes parameters containing script tags
- Multiple failed login attempts followed by successful Contributor login
Network Indicators:
- HTTP requests with JavaScript payloads in post meta or block attribute parameters
- Unexpected outbound connections from WordPress site after page visits
SIEM Query:
source="wordpress.log" AND ("_gspb_post_css" OR "dynamicAttributes") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")🔗 References
- https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.8.3/blockrender/element/block.php#L660
- https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.8.3/init.php#L2110
- https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.8.3/init.php#L2138
- https://www.wordfence.com/threat-intel/vulnerabilities/id/57b7b171-cd25-4bcd-aa75-3ccbfbb1452a?source=cve
