Silentmatt: >> Javascript Expression Evaluator >> 1.2.2 Security Vulnerabilities
npm package `expr-eval` is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolves this issue.
CVSS Score
7.3
EPSS Score
0.001
Published
2025-11-14
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 Score
9.8
EPSS Score
0.001
Published
2025-11-05