CVE-2025-6248
📋 TL;DR
A cross-site scripting vulnerability in Lenovo Browser allows attackers to execute malicious scripts in users' browsers when visiting specially crafted web pages. This could lead to sensitive information theft, session hijacking, or redirection to malicious sites. All users of affected Lenovo Browser versions are potentially at risk.
💻 Affected Systems
- Lenovo Browser
⚠️ 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
Complete account takeover, credential theft, installation of malware, or redirection to phishing sites leading to financial loss or data breach.
Likely Case
Session hijacking, theft of authentication cookies, or extraction of sensitive data from the browser session.
If Mitigated
Minimal impact if browser security settings are hardened, JavaScript is restricted, or the vulnerability is patched.
🎯 Exploit Status
Exploitation requires user to visit attacker-controlled webpage. No authentication needed for the XSS attack itself.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Lenovo advisory for specific patched version
Vendor Advisory: https://iknow.lenovo.com.cn/detail/430154
Restart Required: Yes
Instructions:
1. Visit Lenovo advisory URL. 2. Identify affected version. 3. Update Lenovo Browser via Google Play Store or Lenovo's update mechanism. 4. Restart browser after update.
🔧 Temporary Workarounds
Disable JavaScript
androidTemporarily disable JavaScript in Lenovo Browser settings to prevent XSS execution
Use Alternative Browser
androidSwitch to a different browser until Lenovo Browser is patched
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers if you control web servers accessed by users
- Educate users to avoid clicking suspicious links and to verify website URLs
🔍 How to Verify
Check if Vulnerable:
Check Lenovo Browser version in app settings and compare with advisoryCheck Version:
Open Lenovo Browser → Settings → About → Check version numberVerify Fix Applied:
Update browser, then verify version matches patched version from advisory📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript execution patterns
- Requests to suspicious domains from browser sessions
Network Indicators:
- Unexpected outbound connections from browsers to unknown domains
- Suspicious script loads in HTTP traffic
SIEM Query:
source="browser_logs" AND (event="javascript_execution" AND suspicious_pattern=*) OR (url CONTAINS "malicious_domain")