Prototype Pollution in Silentmatt Expr-eval
CVE-2025-13204
npm package `expr-eval` is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolv…
Vulnerability class: Prototype Pollution
EPSS: 0.004 (33.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
Weakness classification (CWE)
References
- cret@cert.org (Product)
- cret@cert.org (Product)
- cret@cert.org (Product)
- cret@cert.org (Exploit, Third Party Advisory, third-party-advisory)
- cret@cert.org (Product)
- cret@cert.org (Patch, patch, Issue Tracking)
- cret@cert.org (Product, exploit)
Frequently asked questions
- What is CVE-2025-13204?
- CVE-2025-13204 is a high-severity vulnerability in Silentmatt Expr-eval, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.3/10. Published 2025-11-14.
- How severe is CVE-2025-13204?
- High severity. CVSS v3 base score is 7.3 out of 10.