CVE-2024-52476
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files, including web shells, to WordPress servers running the Fediverse Embeds plugin. Attackers can achieve remote code execution and full server compromise. All WordPress sites using Fediverse Embeds versions up to 1.5.3 are affected.
💻 Affected Systems
- Fediverse Embeds 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
Complete server takeover with persistent backdoor installation, data exfiltration, and lateral movement within the network.
Likely Case
Web shell upload leading to website defacement, data theft, and cryptocurrency mining malware deployment.
If Mitigated
File upload attempts blocked at web application firewall level with no successful exploitation.
🎯 Exploit Status
Exploitation requires understanding of WordPress plugin structure and file upload mechanisms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.5.3
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Fediverse Embeds plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin immediately.
🔧 Temporary Workarounds
Disable Plugin
WordPressTemporarily disable the Fediverse Embeds plugin until patched version is available
wp plugin deactivate fediverse-embeds
WAF Rule for File Upload Blocking
allConfigure web application firewall to block suspicious file uploads to plugin directories
🧯 If You Can't Patch
- Implement strict file upload validation at server level using mod_security or similar
- Restrict write permissions to WordPress upload directories and monitor for suspicious files
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Fediverse Embeds → Version. If version is 1.5.3 or lower, you are vulnerable.Check Version:
wp plugin get fediverse-embeds --field=versionVerify Fix Applied:
After update, verify plugin version is higher than 1.5.3. Test file upload functionality with malicious file extensions.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to wp-content/plugins/fediverse-embeds/ directories
- POST requests with PHP/executable file extensions to plugin endpoints
Network Indicators:
- Unexpected outbound connections from web server after file uploads
- Traffic to known web shell command and control servers
SIEM Query:
source="web_server" AND (uri="*fediverse-embeds*" AND (method="POST" AND file_extension IN ("php", "phtml", "exe", "sh")))