CVE-2022-25301
📋 TL;DR
CVE-2022-25301 is a prototype pollution vulnerability in jsgui-lang-essentials that allows attackers to modify JavaScript object prototypes, potentially leading to remote code execution or denial of service. All versions of this npm package are affected. Developers using this package in their applications are vulnerable.
💻 Affected Systems
- jsgui-lang-essentials
📦 What is this software?
Jsgui Lang Essentials by Jsgui Lang Essentials Project
⚠️ 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
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service, application crashes, or data manipulation within the affected application.
If Mitigated
Limited impact if proper input validation and sandboxing are implemented.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available. Exploitation requires user input to reach vulnerable functions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://github.com/metabench/jsgui-lang-essentials/issues/1
Restart Required: Yes
Instructions:
1. Remove jsgui-lang-essentials from package.json. 2. Run npm uninstall jsgui-lang-essentials. 3. Find alternative package or implement custom solution. 4. Restart all affected applications.
🔧 Temporary Workarounds
Input validation and sanitization
allImplement strict input validation to prevent malicious payloads from reaching vulnerable functions.
Object.freeze on prototypes
allUse Object.freeze() to prevent modification of Object.prototype and other critical prototypes.
Object.freeze(Object.prototype);
Object.freeze(Object);
🧯 If You Can't Patch
- Isolate affected applications in network segments with strict egress filtering
- Implement web application firewall (WAF) rules to block prototype pollution payloads
🔍 How to Verify
Check if Vulnerable:
Check package.json or run: npm list jsgui-lang-essentialsCheck Version:
npm list jsgui-lang-essentialsVerify Fix Applied:
Confirm jsgui-lang-essentials is not in package.json and npm list shows no installation📡 Detection & Monitoring
Log Indicators:
- Unusual application crashes
- Unexpected prototype modifications in debug logs
- Suspicious user input patterns
Network Indicators:
- HTTP requests containing __proto__ or constructor payloads
- Unusual outbound connections from application
SIEM Query:
source=application_logs AND ("__proto__" OR "constructor" OR "prototype") AND status=error