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CVE-2025-13204

Good to know:

Date: November 14, 2025

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.

Severity Score

7.3

Related Resources (12)

Url: https://www.huntr.dev/bounties/1-npm-expr-eval/

Url: https://nvd.nist.gov/vuln/detail/CVE-2025-13204

Url: https://www.huntr.dev/bounties/1-npm-expr-eval

Url: https://github.com/silentmatt/expr-eval

Url: https://github.com/silentmatt/expr-eval/commit/6e889e0e75c50ac37d70c35388602025650e0c50

Url: https://github.com/silentmatt/expr-eval/pull/252/files

Url: https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py

Url: https://github.com/jorenbroekema/expr-eval/commit/6c475a118643ae0efe012de283e932fb8b74324b

Url: https://www.npmjs.com/package/expr-eval-fork

Url: https://github.com/jorenbroekema/expr-eval

Url: https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py

Url: https://www.mend.io/vulnerability-database/CVE-2025-13204

Severity Score

7.3

Weakness Type (CWE)

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CWE-1321

Top Fix

Upgrade Version

Upgrade to version expr-eval-fork - 3.0.0

Learn More

CVSS v3.1

Base Score:	7.3
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

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CVE-2025-13204

Good to know:

Date: November 14, 2025

Severity Score

Related Resources (12)

Severity Score

Weakness Type (CWE)

Top Fix

Upgrade Version

CVSS v3.1

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