A vulnerability in Apache Struts 2.3.20-2.3.28* could allow an unauthenticated, remote attacker
to execute arbitrary code on a target server.
In order to be vulnerable Dynamic Method Invocation must be enabled for the target application. The flaw was disclosed on April 22 2016 19:38 GMT. AppCheck was updated on the April 23rd 2016 with a plugin to detect the flaw.
The vulnerability is due to insufficient validation of user-supplied input by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by submitting a malicious expression to a targeted server. If successful, the attacker could execute arbitrary code on the server.
See the following resource for further information;
https://struts.apache.org/docs/s2-032.html
* Versions 2.3.20.3 and 2.3.24.3 are not affected
No software to download or install.
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