Tried, Tested and Proven

Security Advisory 05 – 007 – Password Policy Implemented
At Client rather than Server

Vulnerable System:

Webseries Payment Application

Vulnerability discovery and development:

Portcullis Security Testing Services

Affected Systems:

Bottomline Webseries Payment Application


The password policy, enforcing the minimum length of passwords, is implemented in the client browser using JavaScript which can be bypassed using any local proxy system, allowing for single character passwords.


Whilst client side data validation can be of assistance in aiding a user to correctly enter the required information, client side scripts can be easily by-passed in a number of ways. This allows a user to set their password to a value not acceptable to the implemented security policy.


No exploit code required.


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