CVE-2024-56302
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the ConvertCalculator WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the malicious scripts, the attacker can steal session cookies, redirect users, or perform actions on their behalf. All WordPress sites using vulnerable versions of ConvertCalculator are affected.
💻 Affected Systems
- ConvertCalculator 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
Attackers could steal administrator session cookies, take over WordPress sites, install backdoors, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users, preventing exploitation.
🎯 Exploit Status
Stored XSS vulnerabilities typically require some level of access to inject payloads, but exploitation is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.1.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find ConvertCalculator plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable ConvertCalculator Plugin
allTemporarily disable the vulnerable plugin until patched version is available
wp plugin deactivate convertcalculator
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";
🧯 If You Can't Patch
- Remove ConvertCalculator plugin entirely from WordPress installation
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for ConvertCalculator version. If version is 1.1.1 or earlier, you are vulnerable.Check Version:
wp plugin get convertcalculator --field=versionVerify Fix Applied:
After updating, verify plugin version shows higher than 1.1.1 in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- Suspicious JavaScript payloads in request parameters
- Multiple failed injection attempts
Network Indicators:
- Malicious script tags in HTTP requests to WordPress admin or plugin endpoints
- Unexpected redirects from ConvertCalculator pages
SIEM Query:
source="wordpress.log" AND ("convertcalculator" OR "wp-content/plugins/convertcalculator") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")