CVE-2025-13204
CVE-2025-13204
- State
- Published
- Severity
- 9.8 Critical
- Published
- Nov 14, 2025
- Updated
- Oct 30, 2026
- Reserved
- Nov 14, 2025
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Products
| Product | Versions |
|---|---|
expr-evalsilentmatt |
|
References
- https://www.npmjs.com/package/expr-eval-fork
- https://github.com/silentmatt/expr-eval
- https://github.com/jorenbroekema/expr-eval
- https://www.huntr.dev/bounties/1-npm-expr-eval/third-party-advisory
- https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
- https://github.com/silentmatt/expr-eval/pull/252/filespatch
- https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.pyexploit
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