CVE-2025-24853
📋 TL;DR
CVE-2025-24853 is a cross-site scripting (XSS) vulnerability in Apache JSPWiki that allows attackers to inject malicious JavaScript via wiki markup syntax. When exploited, this can lead to session hijacking, credential theft, or other client-side attacks against users viewing manipulated content. All Apache JSPWiki installations using vulnerable versions are affected.
💻 Affected Systems
- Apache JSPWiki
📦 What is this software?
Jspwiki by Apache
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, take over the wiki instance, and pivot to internal systems, potentially leading to full organizational compromise.
Likely Case
Attackers steal user session cookies or credentials, impersonate legitimate users, and modify or delete wiki content.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized, preventing client-side execution.
🎯 Exploit Status
XSS vulnerabilities are commonly weaponized, and this requires only crafted requests without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.12.3 or later
Vendor Advisory: https://jspwiki-wiki.apache.org/Wiki.jsp?page=CVE-2025-24853
Restart Required: Yes
Instructions:
1. Download Apache JSPWiki 2.12.3 or later from the official Apache website. 2. Backup your current JSPWiki installation and configuration. 3. Replace the vulnerable JSPWiki files with the patched version. 4. Restart your web application server (e.g., Tomcat). 5. Verify the wiki functions correctly after the update.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side filtering to sanitize wiki markup and markdown input before processing.
Configure web application firewall (WAF) rules to block suspicious markup patterns
Implement custom input validation in JSPWiki configuration
Content Security Policy (CSP)
allDeploy CSP headers to restrict script execution from untrusted sources.
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
🧯 If You Can't Patch
- Disable user-generated content features that accept wiki markup or markdown input
- Implement network segmentation to isolate JSPWiki instances from critical systems
🔍 How to Verify
Check if Vulnerable:
Check your JSPWiki version against the vulnerable range (before 2.12.3) and review if wiki markup/markdown parsing is enabled.Check Version:
Check the JSPWiki web interface footer or review the application's version file in the installation directory.Verify Fix Applied:
After upgrading to 2.12.3 or later, test by attempting to inject basic XSS payloads via wiki markup and verify they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual patterns in wiki edit logs containing script tags or JavaScript code
- Multiple failed markup parsing attempts
Network Indicators:
- HTTP requests containing suspicious wiki markup patterns with script elements
- Unexpected outbound connections from client browsers after viewing wiki pages
SIEM Query:
source="jspwiki.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")