CVE-2025-67634
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in the CISA Software Acquisition Guide Supplier Response Web Tool. Attackers can craft malicious JSON files that, when imported by users, inject and execute JavaScript in the user's browser context. This affects users of the web tool before December 11, 2025.
💻 Affected Systems
- CISA Software Acquisition Guide Supplier Response Web Tool
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal user credentials, session tokens, or perform actions on behalf of authenticated users, potentially compromising the entire software acquisition process.
Likely Case
Attackers would likely use this to steal session cookies or credentials, enabling unauthorized access to the tool and potentially sensitive supplier response data.
If Mitigated
With proper input validation and output encoding, the malicious JavaScript would be neutralized before execution, preventing any impact.
🎯 Exploit Status
Exploitation requires user interaction (importing malicious JSON file) but the technical complexity is low once the malicious file is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version updated on or after 2025-12-11
Vendor Advisory: https://www.cisa.gov/software-acquisition-guide/tool
Restart Required: No
Instructions:
1. Access the CISA Software Acquisition Guide Supplier Response Web Tool. 2. Verify the tool has been updated to version dated 2025-12-11 or later. 3. No restart required as this is a web application fix.
🔧 Temporary Workarounds
Disable JSON file import functionality
allTemporarily disable the ability to import JSON files in the web tool until patched.
Implement Content Security Policy (CSP)
allAdd CSP headers to prevent execution of inline JavaScript and restrict script sources.
🧯 If You Can't Patch
- Implement strict input validation and output encoding for all user-supplied data in the web application
- Train users to only import JSON files from trusted sources and verify file integrity before import
🔍 How to Verify
Check if Vulnerable:
Check if the web tool version is dated before 2025-12-11 by examining the application footer or version information.Check Version:
No command available - check web interface for version informationVerify Fix Applied:
Verify the tool shows version date of 2025-12-11 or later, and test that imported JSON files with script tags are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual JSON import activity
- Multiple failed import attempts
- Import of files with suspicious content
Network Indicators:
- HTTP requests containing malicious script payloads in POST data
- Unusual file upload patterns
SIEM Query:
web_application_logs WHERE (event_type = 'file_import' AND file_type = 'json') AND (content CONTAINS '<script>' OR content CONTAINS 'javascript:')