CVE-2024-13579
📋 TL;DR
The WP-Asambleas WordPress plugin has a stored XSS vulnerability in its 'polls_popup' shortcode that allows authenticated attackers with contributor-level 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 WP-Asambleas plugin versions up to 2.85.0 are affected.
💻 Affected Systems
- WP-Asambleas WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, deface websites, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to complete site compromise.
Likely Case
Attackers with contributor access inject malicious scripts to steal session cookies or credentials from users visiting affected pages, leading to account takeover.
If Mitigated
With proper input validation and output escaping, malicious scripts are neutralized before execution, preventing exploitation.
🎯 Exploit Status
Exploitation requires authenticated access (contributor or higher) and knowledge of the vulnerable shortcode. The vulnerability is well-documented with technical details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.85.1 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/wp-asambleas/trunk/modules/shortcodes.php#L999
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WP-Asambleas plugin. 4. Click 'Update Now' if update available. 5. If no update available, manually download version 2.85.1+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the WP-Asambleas plugin until patched
wp plugin deactivate wp-asambleas
Remove Contributor Access
linuxTemporarily remove contributor-level access from untrusted users
wp user list --role=contributor --field=ID | xargs wp user set-role subscriber
🧯 If You Can't Patch
- Remove the WP-Asambleas plugin completely from the WordPress installation
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WP-Asambleas version. If version is 2.85.0 or lower, the site is vulnerable.Check Version:
wp plugin get wp-asambleas --field=versionVerify Fix Applied:
After updating, verify WP-Asambleas plugin version is 2.85.1 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual shortcode usage in post/page content
- Multiple failed login attempts followed by successful contributor login
- Posts/pages with suspicious script tags or encoded payloads
Network Indicators:
- Outbound connections to suspicious domains from WordPress site
- Unexpected JavaScript execution in browser developer tools
SIEM Query:
source="wordpress" AND (plugin="wp-asambleas" AND version<="2.85.0") OR (event="post_edit" AND user_role="contributor" AND content CONTAINS "polls_popup")