CVE-2025-31378
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Oppso Unit Converter WordPress plugin. When users visit specially crafted URLs containing malicious input, their browsers execute the attacker's code in the context of the vulnerable site. All WordPress sites using affected versions of this plugin are vulnerable.
💻 Affected Systems
- Oppso Unit Converter 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 steal user session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users if combined with other vulnerabilities.
Likely Case
Attackers create phishing links that appear legitimate but execute malicious JavaScript when clicked, potentially stealing user credentials or session data.
If Mitigated
With proper input validation and output encoding, malicious scripts would be rendered harmless as plain text rather than executable code.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited and require minimal technical skill to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find 'Oppso Unit Converter'
4. Click 'Update Now' if update is available
5. If no update appears, manually download version 1.1.2+ from WordPress repository
6. Deactivate old plugin, upload new version, activate
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate oppso-unit-converter
Web Application Firewall (WAF)
allConfigure WAF to block XSS payload patterns in URL parameters
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use input validation filters to sanitize all user-supplied parameters
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Oppso Unit Converter versionCheck Version:
wp plugin get oppso-unit-converter --field=versionVerify Fix Applied:
Verify plugin version is 1.1.2 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual long URL parameters containing script tags or JavaScript code
- Multiple failed attempts with suspicious parameter values
Network Indicators:
- HTTP requests with script tags in query parameters
- URLs containing javascript: protocol or event handlers
SIEM Query:
source="*access.log*" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=") AND "oppso-unit-converter"