CVE-2023-54341
📋 TL;DR
Webgrind versions 1.1 and earlier contain a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious JavaScript via the file parameter. This enables attackers to execute arbitrary code in victims' browsers when they click crafted malicious URLs. Anyone running vulnerable Webgrind installations is affected.
💻 Affected Systems
- Webgrind
📦 What is this software?
Webgrind by Webgrind Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal session cookies, perform account takeovers, redirect users to malicious sites, or perform actions on behalf of authenticated users.
Likely Case
Session hijacking, credential theft, or defacement of the Webgrind interface through injected content.
If Mitigated
Limited impact with proper input validation and output encoding; attackers can only target users who click malicious links.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link) but is trivial to craft.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2 or later
Vendor Advisory: http://github.com/jokkedk/webgrind/
Restart Required: No
Instructions:
1. Download latest version from GitHub. 2. Replace existing Webgrind files. 3. No restart required as it's PHP-based.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize file parameter before processing
Modify index.php to validate file parameter using htmlspecialchars() or similar
Web Application Firewall
allDeploy WAF rules to block XSS payloads in file parameter
🧯 If You Can't Patch
- Restrict access to Webgrind interface using network ACLs or authentication
- Implement Content Security Policy headers to mitigate script execution
🔍 How to Verify
Check if Vulnerable:
Test by accessing index.php?file=<script>alert('XSS')</script> and checking if script executesCheck Version:
Check webgrind/config.php or README for version informationVerify Fix Applied:
After update, test same payload; script should not execute and input should be properly encoded📡 Detection & Monitoring
Log Indicators:
- HTTP requests with script tags or JavaScript in file parameter
- Unusual file parameter values in access logs
Network Indicators:
- HTTP requests containing malicious script patterns in query strings
SIEM Query:
source="webgrind_access.log" AND (file="*<script>*" OR file="*javascript:*")