CVE Vulnerabilities

CVE-2021-28170

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

Published: May 26, 2021 | Modified: Apr 25, 2022
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.

Weakness

The product 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.

Affected Software

Name Vendor Start Version End Version
Jakarta_expression_language Eclipse * 3.0.3

Potential Mitigations

  • If user-controlled data must be added to an expression interpreter, one or more of the following should be performed:

References