CVE-2024-32391
📋 TL;DR
This CVE describes a Cross-Site Scripting (XSS) vulnerability in MacCMS v.10 version 2024.1000.3000 that allows remote attackers to inject malicious scripts into web pages. Attackers can execute arbitrary code in users' browsers when they visit compromised pages, potentially stealing session cookies, redirecting users, or performing actions on their behalf. All users running the affected version of MacCMS v.10 are vulnerable.
💻 Affected Systems
- MacCMS v.10
📦 What is this software?
Maccms by Maccms
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, session hijacking, credential theft, defacement of website, and installation of malware on visitors' systems through drive-by downloads.
Likely Case
Session cookie theft leading to unauthorized access, defacement of website content, redirection to malicious sites, and data exfiltration from user browsers.
If Mitigated
Limited impact with proper Content Security Policy (CSP) headers, input validation, and output encoding in place; attackers may still inject scripts but execution would be blocked.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited with readily available payloads; the GitHub issue may contain proof-of-concept details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issues for updated version or patch
Vendor Advisory: https://github.com/magicblack/maccms10/issues/1133
Restart Required: No
Instructions:
1. Monitor the GitHub issue for official patches. 2. Apply any available updates from the vendor. 3. Test the fix in a staging environment before production deployment.
🔧 Temporary Workarounds
Implement Content Security Policy (CSP)
allAdd CSP headers to restrict script execution sources and mitigate XSS impact.
Add to web server config: Content-Security-Policy: default-src 'self'; script-src 'self'
Input Validation and Output Encoding
allSanitize user inputs and encode outputs to prevent script injection.
Implement input validation in application code and use output encoding functions for user-controlled data.
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules to block malicious payloads.
- Disable or restrict user input fields that are not essential to reduce attack surface.
🔍 How to Verify
Check if Vulnerable:
Test by injecting a simple XSS payload (e.g., <script>alert('test')</script>) into user input fields and check if it executes.Check Version:
Check the MacCMS version in the admin panel or configuration files; typically found in a version file or database setting.Verify Fix Applied:
Re-test with the same XSS payload after applying patches or workarounds to ensure it no longer executes.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests with script tags or encoded payloads in parameters
- Errors related to script execution or CSP violations in web server logs
Network Indicators:
- HTTP requests containing suspicious strings like <script>, javascript:, or encoded characters in URLs
SIEM Query:
source="web_logs" AND (http_request LIKE "%<script>%" OR http_request LIKE "%javascript:%")