CVE-2025-8723
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary PHP code on WordPress sites using the Cloudflare Image Resizing plugin. All WordPress installations with this plugin up to version 1.5.6 are affected. Attackers can take full control of vulnerable websites.
💻 Affected Systems
- Cloudflare Image Resizing plugin 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
Complete compromise of the WordPress site, allowing attackers to install backdoors, steal data, deface the site, or pivot to internal networks.
Likely Case
Attackers install cryptocurrency miners, create backdoors, or use the site for phishing campaigns.
If Mitigated
With proper network segmentation and monitoring, impact could be limited to the web server only.
🎯 Exploit Status
The vulnerability requires no authentication and has simple exploitation vectors, making it attractive for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.7
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3341917/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins. 3. Find Cloudflare Image Resizing. 4. Click 'Update Now' or manually update to version 1.5.7+. 5. Verify the plugin is updated.
🔧 Temporary Workarounds
Disable the plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate cf-image-resizing
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with rules to block RCE attempts
- Restrict access to the WordPress admin interface using IP whitelisting
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Cloudflare Image Resizing. If version is 1.5.6 or lower, you are vulnerable.Check Version:
wp plugin list --name=cf-image-resizing --field=versionVerify Fix Applied:
Verify the plugin version shows 1.5.7 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress REST API endpoints
- Suspicious PHP file creation in wp-content/uploads
Network Indicators:
- Unusual outbound connections from web server
- Traffic to known malicious domains
SIEM Query:
source="wordpress.log" AND ("cf-image-resizing" OR "hook_rest_pre_dispatch") AND status=200