Because some clients have reported unauthorized activity on their accounts, a security analyst is reviewing network packet captures from the company's API server. A portion of a capture file is shown below:
POST /services/v1_0/Public/Members.svc/soap
<s:Envelope+xmlns:s="http://schemas.s/soap/envelope/"><s:Body><GetIPLoc ation+xmlns="http://tempuri.org/">
<request+xmlns:a="http://schemas.somesite.org"+xmlns:i="http://www.w3.o rg/2001/XMLSchema-instance"></s:Body></s:Envelope> 192.168.1.22 - - api.somesite.com 200 0 1006 1001 0 192.168.1.22 POST /services/v1_0/Public/Members.svc/soap
<<a:Password>Password123</a:Password><a:ResetPasswordToken+i:nil="true"
/>
<a:ShouldImpersonatedAuthenticationBePopulated+i:nil="true"/><a:Usernam e>[email protected]</a:Username></request></Login></s:Body></s:E nvelope> 192.168.5.66 - - api.somesite.com 200 0 11558 1712 2024
192.168.4.89
POST /services/v1_0/Public/Members.svc/soap
<s:Envelope+xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body
><GetIPLocation+xmlns="http://tempuri.org/">
<a:IPAddress>516.7.446.605</a:IPAddress><a:ZipCode+i:nil="true"/></requ est></GetIPLocation></s:Body></s:Envelope> 192.168.1.22 - - api.somesite.com 200 0 1003 1011 307 192.168.1.22 POST /services/v1_0/Public/Members.svc/soap
<s:Envelope+xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body
><IsLoggedIn+xmlns="http://tempuri.org/">
<request+xmlns:a="http://schemas.datacontract.org/2004/07/somesite.web+ xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><a:Authentication>
<a:ApiToken>kmL4krg2CwwWBan5BReGv5Djb7syxXTNKcWFuSjd</a:ApiToken><a:Imp ersonateUserId>0</a:ImpersonateUserId><a:LocationId>161222</a:LocationI d>
<a:NetworkId>4</a:NetworkId><a:ProviderId>''1=1</a:ProviderId><a:UserId
>13026046</a:UserId></a:Authentication></request></IsLoggedIn></s:Body>
</s:Envelope> 192.168.5.66 - - api.somesite.com 200 0 1378 1209 48
192.168.4.89
Which of the following MOST likely explains how the clients' accounts were compromised?