CVE-2023-45658
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the POSIMYTH Nexter WordPress theme. It allows attackers to bypass access controls and perform unauthorized actions on affected websites. All WordPress sites using Nexter theme versions up to 2.0.3 are vulnerable.
💻 Affected Systems
- POSIMYTH Nexter WordPress Theme
⚠️ 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 gain administrative access to WordPress sites, modify content, install malicious plugins/themes, steal sensitive data, or completely compromise the website.
Likely Case
Attackers modify site content, inject malicious code, or access restricted areas to steal user data or deface the website.
If Mitigated
With proper authorization checks, only authenticated users with appropriate permissions can access sensitive functionality.
🎯 Exploit Status
The vulnerability is publicly documented with technical details, making exploitation straightforward for attackers with basic WordPress knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 2.0.4 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/nexter/wordpress-nexter-theme-2-0-3-broken-access-control-vulnerability
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check if Nexter theme update is available. 4. Update to version 2.0.4 or later. 5. Clear any caching plugins/CDN caches.
🔧 Temporary Workarounds
Disable Nexter Theme
allSwitch to a different WordPress theme until patched
wp theme activate twentytwentyfour
wp theme deactivate nexter
Restrict Access via .htaccess
linuxAdd access restrictions to theme directories
Order Deny,Allow
Deny from all
🧯 If You Can't Patch
- Switch to a different WordPress theme immediately
- Implement web application firewall rules to block unauthorized access patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Nexter theme version. If version is 2.0.3 or earlier, you are vulnerable.Check Version:
wp theme list --name=nexter --fields=name,status,versionVerify Fix Applied:
After updating, verify Nexter theme version shows 2.0.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to theme files or admin functions
- Multiple failed authorization attempts followed by successful access
- Unusual user role changes or privilege escalations
Network Indicators:
- HTTP requests to theme-specific endpoints without proper authentication headers
- Unusual POST requests to admin-ajax.php or theme functions
SIEM Query:
source="wordpress.log" AND ("nexter" OR "theme" OR "admin-ajax") AND (status=200 OR status=302) AND user="unauthenticated"