Struts2 vulnerability analysis of the Ognl expression characteristics of the initiator of new ideas-vulnerability warning-the black bar safety net

A, summary In Ognl expression, it will be in parentheses“”contains the variable content as a Ognl expression execution. Ognl expressions of this characteristic, triggering a new attack ideas. By the malicious code is stored into a variable, and then call in Ognl expressions in the function that...