CVE-2025-59364
express-xss-sanitizer has an unbounded recursion depth
Impact
# 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 ```
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | express-xss-sanitizer | < 2.0.1 | 2.0.1 |
Affected products
| Product | Affected versions |
|---|---|
| Express-Xss-Sanitizer (Aka Express XSS Sanitizer) Package | through 2.0.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://gist.github.com/Spendroslav/177804eaef5acfb222a550de212a1b94
- https://github.com/AhmedAdelFahim/express-xss-sanitizer
- https://www.npmjs.com/package/express-xss-sanitizer
- https://github.com/advisories/GHSA-hvq2-wf92-j4f3
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/security/advisories/GHSA-hvq2-wf92-j4f3
- https://nvd.nist.gov/vuln/detail/CVE-2025-59364
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/pull/23
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/62d6542a2a57298da7a2e02de623454007e4f6d6
- https://dbugs.ptsecurity.com/vulnerability/PT-2025-37434
- https://www.tenable.com/cve/CVE-2025-59364