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Improper Control of Generation of Code ('Code Injection') in expr-eval

CVE-2025-12735

  • expr-eval
  • expr-eval-fork
  • org.webjars.bower:github-com-silentmatt-expr-eval
  • org.webjars.bowergithub.silentmatt:expr-eval
  • org.webjars.npm:expr-eval
  • org.webjars.npm:github-com-silentmatt-expr-eval
High
9.8/10

Summary

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 variables object into the "evaluate()" function and trigger arbitrary code execution.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-94 - Code Injection

Code injection is a type of vulnerability that allows an attacker to execute arbitrary code. This vulnerability fully compromises the machine and can cause a wide variety of security issues, such as unauthorized access to sensitive information, manipulation of data, denial of service attacks etc. Code injection is different from command injection in the fact that it is limited by the functionality of the injected language (e.g. PHP), as opposed to command injection, which leverages existing code to execute commands, usually within the context of a shell.

References

Advisory Timeline

  • Published