CVE-2025-13204
HIGH7.3EPSS 0.06%expr-eval vulnerable to Prototype Pollution
Published: 11/14/2025Modified: 2/4/2026
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.
Affected packages (2)
- npm/expr-evalfrom 0, <= 2.0.2
- npm/expr-eval-forkfrom 0, < 2.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
References (10)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-13204
- PATCHhttps://github.com/silentmatt/expr-eval
- WEBhttps://github.com/jorenbroekema/expr-eval
- WEBhttps://github.com/jorenbroekema/expr-eval/commit/6c475a118643ae0efe012de283e932fb8b74324b
- WEBhttps://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
- WEBhttps://github.com/silentmatt/expr-eval/commit/6e889e0e75c50ac37d70c35388602025650e0c50
- WEBhttps://github.com/silentmatt/expr-eval/pull/252/files
- WEBhttps://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py
- WEBhttps://www.huntr.dev/bounties/1-npm-expr-eval
- WEBhttps://www.npmjs.com/package/expr-eval-fork