CVE-2025-12735

The expr-eval library is a JavaScript expression parser and evaluator designed to safely evaluate mathematical expressions with user-defined variables. However, due to insufficient input validation, an attacker can pass a crafted context object or use MEMBER of the context object into the evaluate() function and trigger arbitrary code execution.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/advisories/GHSA-jc85-fpwf-qm7x	Third Party Advisory
https://github.com/jorenbroekema/expr-eval	Product
https://github.com/silentmatt/expr-eval	Product
https://github.com/silentmatt/expr-eval/pull/288	Issue Tracking Patch
https://kb.cert.org/vuls/id/263614	Third Party Advisory
https://www.npmjs.com/package/expr-eval	Product
https://www.npmjs.com/package/expr-eval-fork	Product
https://www.kb.cert.org/vuls/id/263614	Third Party Advisory
https://github.com/jorenbroekema/expr-eval/blob/460b820ba01c5aca6c5d84a7d4f1fa5d1913c67b/test/security.js	Product

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:jorenbroekema:javascript_expression_evaluator:3.0.0:::::node.js::
	cpe:2.3:a:silentmatt:javascript_expression_evaluator::::::node.js::*

History

18 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) La biblioteca expr-eval es un analizador y evaluador de expresiones JavaScript diseñado para evaluar de forma segura expresiones matemáticas con variables definidas por el usuario. Sin embargo, debido a una validación de entrada insuficiente, un atacante puede pasar un objeto de contexto manipulado o usar MEMBER del objeto de contexto en la función evaluate() y desencadenar la ejecución de código arbitrario.

Information

Published : 2025-11-05 01:15

Updated : 2026-10-18 21:10

NVD link : CVE-2025-12735

Mitre link : CVE-2025-12735

CVE.ORG link : CVE-2025-12735

JSON object : View

Products Affected

jorenbroekema

javascript_expression_evaluator

silentmatt

javascript_expression_evaluator

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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