CVE-2026-23549
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the WpEvently mage-eventpress WordPress plugin. Successful exploitation could lead to remote code execution or other malicious activities. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- magepeopleteam WpEvently mage-eventpress 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
Remote code execution leading to complete site compromise, data theft, or server takeover.
Likely Case
Arbitrary code execution within WordPress context, potentially allowing plugin/theme modification, backdoor installation, or privilege escalation.
If Mitigated
Limited impact if proper input validation and security controls prevent exploitation attempts.
🎯 Exploit Status
Deserialization vulnerabilities are commonly exploited and weaponized quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 5.1.1
Restart Required: No
Instructions:
1. Update the WpEvently plugin to the latest version via WordPress admin panel. 2. Verify the plugin version is greater than 5.1.1. 3. Test plugin functionality after update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate the WpEvently plugin until patched
wp plugin deactivate mage-eventpress
Restrict plugin access
allUse web application firewall to block requests to vulnerable endpoints
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all plugin data inputs
- Deploy web application firewall with rules to detect and block deserialization attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > WpEvently version. If version is 5.1.1 or lower, you are vulnerable.Check Version:
wp plugin get mage-eventpress --field=versionVerify Fix Applied:
Verify plugin version is greater than 5.1.1 and test plugin functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- PHP deserialization errors in logs
- Unexpected file modifications in wp-content/plugins/mage-eventpress
Network Indicators:
- HTTP requests containing serialized PHP objects
- Traffic to plugin-specific endpoints with unusual payloads
SIEM Query:
source="wordpress.log" AND ("mage-eventpress" OR "WpEvently") AND ("unserialize" OR "POST" OR "php_object")