Field Assessment
AI analysis pending.
CVE
CVE-2007-4556
Severity
MEDIUM
CVSS
6.8
EPSS
25.75%
Apache
Original Filing — NVD Description
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.