Uncontrolled Recursion Affecting express-xss-sanitizer package, versions *
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Test your applications- Snyk IDSNYK-JS-EXPRESSXSSSANITIZER-12670886
- published15 Sept 2025
- disclosed14 Sept 2025
- creditSpendroslav
Introduced: 14 Sep 2025
NewCVE-2025-59364 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
There is no fixed version for express-xss-sanitizer.
Overview
express-xss-sanitizer is an Express 4.x middleware which sanitizes user input data (in req.body, req.query, req.headers and req.params) to prevent Cross Site Scripting (XSS) attack.
Affected versions of this package are vulnerable to Uncontrolled Recursion via the sanitize function in lib/sanitize.js when processing a JSON request body. An attacker can cause the application to become unresponsive or crash by submitting specially crafted input that triggers unbounded recursion.