CVE-2026-24530
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the sheepfish WebP Conversion WordPress plugin that allows attackers to bypass access controls. It affects WordPress sites using the WebP Conversion plugin version 2.1 and earlier, potentially enabling unauthorized actions.
💻 Affected Systems
- sheepfish WebP Conversion 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
Attackers could modify plugin settings, upload malicious files, or perform administrative actions without authentication, potentially leading to site compromise.
Likely Case
Unauthorized users could change WebP conversion settings, disrupt image processing functionality, or access restricted plugin features.
If Mitigated
With proper authorization controls, only authenticated administrators could access plugin functions, limiting impact to configuration changes.
🎯 Exploit Status
Broken access control vulnerabilities typically require minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins > Installed Plugins
3. Find 'WebP Conversion' plugin
4. Click 'Update Now' if update available
5. If no update, deactivate and remove plugin
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate webp-conversion
Restrict Access via .htaccess
linuxBlock access to plugin directories
# Add to .htaccess in WordPress root:
<FilesMatch "^(webp-conversion|wp-content/plugins/webp-conversion)">
Order Deny,Allow
Deny from all
</FilesMatch>
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block unauthorized access to plugin endpoints
- Restrict plugin access to specific IP addresses using server configuration
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > WebP Conversion version. If version is 2.1 or earlier, you are vulnerable.Check Version:
wp plugin get webp-conversion --field=versionVerify Fix Applied:
After update, verify plugin version is greater than 2.1. Test access control by attempting unauthorized actions.📡 Detection & Monitoring
Log Indicators:
- Unauthorized POST requests to /wp-admin/admin-ajax.php with webp-conversion actions
- Failed authentication attempts followed by successful plugin function calls
Network Indicators:
- Unusual traffic patterns to plugin-specific endpoints from unauthenticated sources
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND parameters CONTAINS "webp-conversion") AND user="-"