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CRITICAL

CVE-2025-12735

CVSS v3

9.8

CRITICAL

EPSS Score

2.3 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2025-11-05

Frequently asked questions

What is 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.

Is CVE-2025-12735 actively exploited?

Active exploitation of CVE-2025-12735 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-12735?

CVE-2025-12735 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2025-12735 affecting your environment?

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