CVE-2025-3573
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages using the jQuery Validation library's showLabel() function. Attackers can exploit user-controlled placeholder values to execute cross-site scripting attacks. Any application using vulnerable versions of jquery-validation is affected.
💻 Affected Systems
- jquery-validation
⚠️ 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 can steal user sessions, redirect users to malicious sites, or perform actions on behalf of authenticated users.
Likely Case
Attackers inject malicious scripts that steal cookies or session tokens from users interacting with vulnerable forms.
If Mitigated
With proper input validation and output encoding, the impact is limited to unsuccessful script injection attempts.
🎯 Exploit Status
Exploitation requires user interaction with vulnerable forms but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.20.0
Vendor Advisory: https://github.com/jquery-validation/jquery-validation/commit/7a490d8f39bd988027568ddcf51755e1f4688902
Restart Required: No
Instructions:
1. Update jquery-validation package to version 1.20.0 or later. 2. For npm: 'npm update jquery-validation'. 3. For manual installation: replace jquery-validation.js with patched version.
🔧 Temporary Workarounds
Input Sanitization
allImplement server-side validation and sanitization of all user inputs, especially placeholder values.
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources.
🧯 If You Can't Patch
- Implement output encoding for all user-controlled data displayed in showLabel() function
- Disable or override the vulnerable showLabel() function with a safe implementation
🔍 How to Verify
Check if Vulnerable:
Check package.json or script tags for jquery-validation version below 1.20.0Check Version:
npm list jquery-validation | grep versionVerify Fix Applied:
Verify jquery-validation version is 1.20.0 or higher in package.json or loaded scripts📡 Detection & Monitoring
Log Indicators:
- Unusual placeholder values containing script tags or JavaScript code
Network Indicators:
- Requests with suspicious placeholder parameters containing script payloads
SIEM Query:
web_logs WHERE placeholder CONTAINS '<script' OR placeholder CONTAINS 'javascript:'