CVE-2025-12735: Jorenbroekema JavaScript Expression Evaluator

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

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.

Affected products

• Jorenbroekema JavaScript Expression Evaluator: version 3.0.0 only
• Silentmatt JavaScript Expression Evaluator: up to and including 2.0.2

Published 2025-11-05. Last modified 2026-06-17.