CVE-2025-59364

Description

# Security Advisory: express-xss-sanitizer ## Overview A vulnerability was discovered in express-xss-sanitizer that allowed unbounded recursion depth during sanitization of nested objects. ## Affected Versions - All versions prior to 2.0.1 ## Patched Versions - 2.0.1 and later ## Description The sanitize function in lib/sanitize.js performed recursive sanitization without depth limiting, making it vulnerable to stack overflow attacks via specially crafted deeply nested JSON objects. ## Impact An attacker could cause denial-of-service by sending a request with deeply nested structures, potentially crashing the Node.js process. ## Solution Upgrade to version 2.0.1 or later: ```bash npm install express-xss-sanitizer@latest ```

How to fix CVE-2025-59364

To remediate CVE-2025-59364, upgrade the affected package to a fixed version below.

• —upgrade to 2.0.1 or later

Is CVE-2025-59364 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 2.0.1

CVSS scores

References (9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-59364
• PATCHgithub.com/AhmedAdelFahim/express-xss-sanitizer
• WEBdbugs.ptsecurity.com/vulnerability/PT-2025-37434
• WEBgist.github.com/Spendroslav/177804eaef5acfb222a550de212a1b94