CVE-2025-13204

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

14/11/2025

Last modified:

14/11/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 7.30 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): Low

Base Score 3.x

7.30

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py
https://github.com/jorenbroekema/expr-eval
https://github.com/silentmatt/expr-eval
https://github.com/silentmatt/expr-eval/pull/252/files
https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py
https://www.huntr.dev/bounties/1-npm-expr-eval/
https://www.npmjs.com/package/expr-eval-fork