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Vulnerability record · CVE-2025-12735 · published 5 November 2025

CVE-2025-12735: Jorenbroekema javascript expression evaluator code injection vulnerability

JJorenbroekema · Javascript Expression Evaluator

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.

9.8 CVSS 3.1 Critical EPSS 2.3% · top 17.8% CWE-94 · Code injection
9.8CVSS 3.1 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
9References
17 Jun 2026Last modified by NVD

Description

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 TrackingPatch
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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-12735), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.