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Who should read this

All Struts 2 developers and users

Impact of vulnerability

Possible Remote Code Execution vulnerability

Maximum security rating

Medium

Recommendation

Always validate incoming parameters' values when re-assigning them to certain Struts' tags attributes.

Don't use %{...} syntax in tag attributes other than value unless you have a valid use-case.

Alternatively upgrade to Struts 2.3.29 or Struts 2.5.1

Affected Software

Struts 2.0.0 - Struts 2.3.28.1

Reporters

Alvaro Munoz alvaro dot munoz at hpe.com

CVE Identifier

CVE-2016-0785

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By upgrading to Struts 2.3.29 or 2.5.1, possible malicious effects of forced double evaluation are limited.

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