CVE-2024-2040
📋 TL;DR
This CSRF vulnerability in the Himer WordPress theme allows attackers to trick authenticated users into unknowingly joining private groups. Attackers can craft malicious requests that execute when users visit compromised pages. WordPress sites using Himer theme versions before 2.1.1 are affected.
💻 Affected Systems
- Himer WordPress Theme
📦 What is this software?
Himer by 2code
⚠️ Risk & Real-World Impact
Worst Case
Attackers could force users to join malicious private groups, potentially exposing them to phishing, malware distribution, or social engineering attacks within the group context.
Likely Case
Users are tricked into joining unwanted private groups, compromising privacy and potentially exposing them to malicious content from group administrators.
If Mitigated
With proper CSRF protections, users maintain control over group membership decisions and cannot be forced into unwanted groups.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated users into visiting malicious pages. No authentication bypass needed beyond user being logged in.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.1
Vendor Advisory: https://wpscan.com/vulnerability/1b97bbf0-c7d1-4e6c-bb80-f9bf45fbfe1e/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check if Himer theme is active. 4. Update to version 2.1.1 or later via theme update or manual upload. 5. Clear any caching plugins.
🔧 Temporary Workarounds
Temporary CSRF Protection
allAdd CSRF tokens to group joining forms via custom code or security plugin
Add nonce verification to theme's group joining functionality
Disable Group Joining
allTemporarily disable private group joining functionality
Add 'remove_action' hooks for group join functions in theme
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Educate users about not clicking suspicious links while logged into the site
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Appearance > Themes > Himer theme details for version numberCheck Version:
In WordPress: wp theme list --field=name,version | grep HimerVerify Fix Applied:
Verify theme version is 2.1.1 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Multiple group join requests from same IP with different user agents
- Group membership changes without corresponding user page visits
Network Indicators:
- POST requests to group join endpoints without proper referrer headers
- Suspicious cross-origin requests to group functionality
SIEM Query:
source="wordpress.log" AND ("action=join_group" OR "group_membership") AND NOT referrer="*site-domain*"