CVE-2025-12735

Name: CVE-2025-12735
Creator: NVD / NIST
Published: 2025-11-05T01:15:33.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.20%

Last modified Jun 17, 2026

CVE-2025-12735 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.20%

80.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Jorenbroekema	Javascript Expression Evaluator	3.0.0
Silentmatt	Javascript Expression Evaluator	<= 2.0.2

References

https://github.com/advisories/GHSA-jc85-fpwf-qm7xThird Party Advisory
https://github.com/jorenbroekema/expr-evalProduct
https://github.com/silentmatt/expr-evalProduct
https://github.com/silentmatt/expr-eval/pull/288Issue Tracking, Patch
https://kb.cert.org/vuls/id/263614Third Party Advisory
https://www.npmjs.com/package/expr-evalProduct
https://www.npmjs.com/package/expr-eval-forkProduct
https://www.kb.cert.org/vuls/id/263614Third Party Advisory
https://github.com/jorenbroekema/expr-eval/blob/460b820ba01c5aca6c5d84a7d4f1fa5d1913c67b/test/security.jsProduct

Timeline

Published: Nov 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-12735?

How severe is CVE-2025-12735?

CVE-2025-12735 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.20% probability of exploitation in the next 30 days.

How do I fix CVE-2025-12735?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-12735?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST