CVE-2025-39527
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the Rating by BestWebSoft WordPress plugin. Successful exploitation could lead to remote code execution or other malicious activities. All WordPress sites using affected versions of this plugin are vulnerable.
💻 Affected Systems
- Rating by BestWebSoft 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, and server takeover.
Likely Case
Arbitrary code execution allowing attackers to create backdoors, modify content, or steal sensitive data.
If Mitigated
Limited impact if proper input validation and security controls prevent successful exploitation.
🎯 Exploit Status
PHP object injection vulnerabilities are commonly exploited and weaponized quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.7
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Rating by BestWebSoft'
4. Click 'Update Now' if available
5. If no update available, deactivate and remove the plugin
🔧 Temporary Workarounds
Disable Plugin
allDeactivate the vulnerable plugin to prevent exploitation
wp plugin deactivate rating-bws
Remove Plugin Files
linuxCompletely remove the plugin files from the server
rm -rf /path/to/wp-content/plugins/rating-bws/
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block deserialization attacks
- Restrict access to affected WordPress sites using IP whitelisting
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Rating by BestWebSoft versionCheck Version:
wp plugin get rating-bws --field=versionVerify Fix Applied:
Verify plugin version is greater than 1.7 or plugin is removed📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or plugin endpoints
- PHP errors related to unserialize() or object injection
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Traffic patterns targeting the rating plugin endpoints
SIEM Query:
source="wordpress.log" AND ("rating-bws" OR "unserialize" OR "PHP object injection")