Improper Input Validation in OpenSymphony XWork
Date: 2022-05
Affected: maven/com.opensymphony:xwork, maven/com.opensymphony:xwork
Attack vector: other
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2008-6504
CWE: CWE-20

ParametersInterceptor in OpenSymphony XWork 2.0.x before 2.0.6 and 2.1.x before 2.1.2, as used in Apache Struts and other products, does not properly restrict # (pound sign) references to context objects, which allows remote attackers to execute Object-Graph Navigation Language (OGNL) statements and modify server-side context objects, as demonstrated by use of a \u0023 representation for the # character.


Mitigations:

Architectural layers (MAESTRO):