CVE-2025-30973
📋 TL;DR
CVE-2025-30973 is a PHP object injection vulnerability in Codexpert, Inc's CoSchool LMS WordPress plugin that allows attackers to execute arbitrary code through deserialization of untrusted data. This affects all CoSchool LMS installations running versions up to 1.4.3. Attackers can exploit this to gain unauthorized access and control over affected WordPress sites.
💻 Affected Systems
- Codexpert, Inc CoSchool LMS 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 system compromise, data theft, website defacement, and installation of backdoors or malware.
Likely Case
Unauthorized administrative access to WordPress, data manipulation, and potential lateral movement within the hosting environment.
If Mitigated
Limited impact with proper network segmentation, web application firewalls, and restricted file permissions preventing code execution.
🎯 Exploit Status
Patchstack database shows technical details and proof-of-concept. PHP object injection vulnerabilities are commonly weaponized due to their reliability and impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.4 or later
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/coschool/vulnerability/wordpress-coschool-lms-1-4-3-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find CoSchool LMS plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable CoSchool LMS plugin to prevent exploitation
wp plugin deactivate coschool
Web Application Firewall Rule
allBlock requests containing serialized PHP objects to CoSchool LMS endpoints
ModSecurity rule: SecRule REQUEST_BODY "@rx (O:\d+:\"[^"]+\":\d+:{.*})" "id:1001,phase:2,deny,status:403,msg:'PHP Object Injection Attempt'"
Cloudflare WAF rule: Block requests with patterns matching PHP serialization
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WordPress installation from critical systems
- Deploy web application firewall with rules specifically blocking PHP object injection patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for CoSchool LMS version. If version is 1.4.3 or lower, system is vulnerable.Check Version:
wp plugin get coschool --field=versionVerify Fix Applied:
Verify CoSchool LMS plugin version is 1.4.4 or higher in WordPress admin panel. Test functionality remains working after update.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to CoSchool LMS endpoints
- PHP errors related to unserialize() function
- Unexpected file creation in WordPress uploads or plugins directories
Network Indicators:
- HTTP requests containing serialized PHP object patterns (O: followed by numbers and quotes)
- Traffic to CoSchool LMS endpoints from unexpected sources
SIEM Query:
source="web_logs" AND (uri="*coschool*" OR uri="*wp-content/plugins/coschool*") AND (request_body="*O:[0-9]+:*" OR status=500)