CVE-2024-1376
📋 TL;DR
The Event post WordPress plugin has an authorization vulnerability that allows authenticated users with subscriber-level access or higher to perform unauthorized bulk metadata updates. This occurs because the save_bulkdatas function lacks proper capability checks. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress Event Post Plugin
📦 What is this software?
Event Post by Avecnous
⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify critical post metadata to inject malicious content, redirect users, or compromise site functionality, potentially leading to site takeover or data manipulation.
Likely Case
Attackers modify post metadata to inject malicious scripts, redirect users to phishing sites, or deface content while maintaining plausible deniability.
If Mitigated
With proper user role management and monitoring, impact is limited to metadata manipulation that can be detected and reverted.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authenticated. The vulnerability is publicly documented with technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.9.5 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3086840/event-post/trunk/eventpost.php?old=3060317&old_path=event-post%2Ftrunk%2Feventpost.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Event Post' plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 5.9.5+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched
wp plugin deactivate event-post
Restrict User Roles
allTemporarily limit subscriber-level access or review user permissions
🧯 If You Can't Patch
- Implement strict user role management and audit all subscriber-level accounts
- Enable comprehensive logging of post_meta modifications and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Event Post → Version number. If version is 5.9.4 or lower, you are vulnerable.Check Version:
wp plugin get event-post --field=versionVerify Fix Applied:
After update, confirm Event Post plugin version is 5.9.5 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual post_meta update patterns from subscriber-level users
- Bulk metadata modifications in short timeframes
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with action=save_bulkdatas from unauthorized roles
SIEM Query:
source="wordpress.log" AND ("save_bulkdatas" OR "post_meta" AND "update") AND user_role="subscriber"🔗 References
- https://plugins.trac.wordpress.org/changeset/3086840/event-post/trunk/eventpost.php?old=3060317&old_path=event-post%2Ftrunk%2Feventpost.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/926c09d5-3824-4745-99f6-50d9c945d252?source=cve
- https://plugins.trac.wordpress.org/changeset/3086840/event-post/trunk/eventpost.php?old=3060317&old_path=event-post%2Ftrunk%2Feventpost.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/926c09d5-3824-4745-99f6-50d9c945d252?source=cve
