CVE-2025-13204
CVE-2025-13204
HIGH 7.3EPSS 0.5%
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 resolves this issue.
- Affected
- silentmatt · expr-eval
- CVSS v3.1 CNA
- 7.3 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EPSS
- 0.48% chance of exploitation in the next 30 days, 40th percentile
- Published
- 2025-11-14
Proof-of-concept exploits (2)
- vladko312/extras14★ · 2026-05-21
- vladko312/Research_Successful_Errors124★ · 2026-02-22
Security advisories
- https://www.huntr.dev/bounties/1-npm-expr-eval
- advisories/GHSA-8gw3-rxh4-v6jx
- silentmatt/expr-eval/pull/252/files
- SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
- jorenbroekema/expr-eval
- vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py
- https://www.npmjs.com/package/expr-eval-fork