expr-eval vulnerable to Prototype Pollution
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-13204US | — | — | ||
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 arbi… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.pyWEB
- https://github.com/jorenbroekema/expr-evalWEB
- https://github.com/jorenbroekema/expr-eval/commit/6c475a118643ae0efe012de283e932fb8b74324bWEB
- https://github.com/silentmatt/expr-evalPACKAGE
- https://github.com/silentmatt/expr-eval/commit/6e889e0e75c50ac37d70c35388602025650e0c50WEB
- https://github.com/silentmatt/expr-eval/pull/252/filesWEB
- https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.pyWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-13204ADVISORY
scry
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