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Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

CVE-2021-28170

Medium
5.3/10

Summary

In the Jakarta Expression Language implementation before 3.0.4 and 4.0.x before 4.0.2, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.

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  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
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CWE-917 - Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

The software constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.

References

Advisory Timeline

  • Published