CVE-2025-60313
📋 TL;DR
CVE-2025-60313 is a Cross-Site Scripting (XSS) vulnerability in Sourcecodester Link Status Checker 1.0 that allows remote attackers to inject malicious scripts via the URL input field. This affects all users running the vulnerable version of this PHP web application. Attackers can execute arbitrary JavaScript in victims' browsers when they view the manipulated link status results.
💻 Affected Systems
- Sourcecodester Link Status Checker
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deliver malware payloads through the vulnerable application.
Likely Case
Session hijacking, credential theft, or defacement of the application interface through injected content.
If Mitigated
Limited impact with proper input validation and output encoding, potentially only affecting the specific user viewing manipulated results.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity. No public proof-of-concept was found in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
1. Check Sourcecodester website for updated version
2. Replace vulnerable files with patched versions
3. Implement proper input validation and output encoding
🔧 Temporary Workarounds
Input Validation Filter
PHPAdd server-side validation to sanitize URL inputs before processing
Implement PHP filter_var() with FILTER_VALIDATE_URL or custom regex validation
Output Encoding
PHPEncode all user-controlled output before rendering in HTML
Use htmlspecialchars() or htmlentities() when displaying URL results
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules
- Disable or restrict access to the vulnerable application until patching is possible
🔍 How to Verify
Check if Vulnerable:
Test by entering a basic XSS payload like <script>alert('XSS')</script> in the URL input field and check if it executesCheck Version:
Check the application's version file or documentation, typically in readme.txt or version.phpVerify Fix Applied:
Test with same XSS payloads and verify they are properly sanitized or encoded in output📡 Detection & Monitoring
Log Indicators:
- Unusual long URL parameters containing script tags or JavaScript code
- Multiple failed input validation attempts
Network Indicators:
- HTTP requests with suspicious script tags in URL parameters
- Unexpected JavaScript in application responses
SIEM Query:
web.url:*script* OR web.url:*javascript* AND dest.app:"Link Status Checker"