CVE-2025-24671
📋 TL;DR
This CVE describes a PHP object injection vulnerability in the Pdfcrowd Save as PDF WordPress plugin. Attackers can exploit insecure deserialization to execute arbitrary code on affected WordPress sites. All WordPress installations using this plugin version 4.4.0 or earlier are vulnerable.
💻 Affected Systems
- Save as PDF plugin by Pdfcrowd for WordPress
⚠️ 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 malware installation.
Likely Case
Unauthenticated attackers achieving remote code execution to install backdoors, steal sensitive data, or pivot to other systems.
If Mitigated
If proper input validation and output encoding are implemented, exploitation would be prevented or limited to denial of service.
🎯 Exploit Status
Public proof-of-concept exists, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.1 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Save as PDF by Pdfcrowd'. 4. Click 'Update Now' if available. 5. Alternatively, download version 4.4.1+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the plugin until patched
wp plugin deactivate save-as-pdf-by-pdfcrowd
Restrict plugin access
allUse web application firewall to block requests to plugin endpoints
🧯 If You Can't Patch
- Immediately disable the Save as PDF by Pdfcrowd plugin
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for 'Save as PDF by Pdfcrowd' version 4.4.0 or earlierCheck Version:
wp plugin get save-as-pdf-by-pdfcrowd --field=versionVerify Fix Applied:
Verify plugin version is 4.4.1 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- PHP error logs showing unserialize() warnings
- Web server logs with suspicious parameter values
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Traffic to known exploit patterns for CVE-2025-24671
SIEM Query:
source="web_logs" AND (uri_path="/wp-content/plugins/save-as-pdf-by-pdfcrowd/" OR user_agent CONTAINS "pdfcrowd") AND (params CONTAINS "O:" OR params CONTAINS "a:" OR params CONTAINS "s:")