High · published November 14, 2025
⚡ A sneaky flaw in the npm package `expr-eval` lets attackers tap into JavaScript's prototype powers for arbitrary code execution! 🔥 Think of it as a restaurant where a customer can change the recipe of every dish on the menu — a simple order can lead to chaos in the kitchen if no one is checking those requests! An attacker with access could execute harmful commands that compromise the entire application, leading to data theft or service disruption! This makes the situation particularly alarming if you're using this package in a critical application environment.
Think of it as a restaurant where a customer can change the recipe of every dish on the menu — a simple order can lead to chaos in the kitchen if no one is checking those requests! This vulnerability allows attackers to exploit the prototype pollution vulnerability in the `expr-eval` npm package, enabling arbitrary code execution through the JavaScript prototype chain.
An attacker with access could execute harmful commands that compromise the entire application, leading to data theft or service disruption! This makes the situation particularly alarming if you're using this package in a critical application environment. Upgrade to the `expr-eval-fork` package immediately to patch this vulnerability. Review your code to ensure no other components are affected by similar issues, and consider implementing strict validation for user inputs. You've got this! With these steps, you can protect your application and maintain your security hero status! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| silentmatt/javascript_expression_evaluator | all versions | — |