Struts support in OpenSymphony XWork before 1.2.3, and 2.x before 2.0.4, as used in WebWork and Apache Struts, recursively evaluates all input as an Object-Graph Navigation Language (OGNL) expression when altSyntax is enabled, which allows remote attackers to cause a denial of service (infinite loop) or execute arbitrary code via form input beginning with a "%{" sequence and ending with a "}" character.
| Software | From | Fixed in |
|---|---|---|
| opensymphony / xwork | 2.0.0 | 2.0.4.x |
| opensymphony / xwork | - | 1.2.3 |
com.opensymphony / xwork
|
- | 1.2.3 |
com.opensymphony / xwork
|
2.0.0 | 2.0.4 |