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Published: 11th May 20212nd September 2021

Version: 12.0.0

Severity: Medium

CVSS Score: 4.8 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N) 


In order to exploit this vulnerability, the malicious actor should have a valid user account of the API Publisher. If such access could be obtained, they could make a change that impacts other users viewing the affected APIs using the API Store. The possible impacts include, getting the browser redirected to a malicious website, making changes in the UI of the web page, retrieving information from the browser or harm otherwise. However, since all the session related sensitive cookies are set with "httpOnly" flag and protected, session hijacking or similar attacks would not be possible.


If you are using an affected product version, it is highly recommended to migrate to the latest released version to the latest version of the affected WSO2 product is not mentioned under the affected product list, you may migrate to the latest version to receive security fixes.


Otherwise you may


apply the relevant fixes to the product based on


the public fix:

Note: If you are a WSO2 customer with Support Subscription, please use WSO2 Update Manager (WUM) updates please use WSO2 Updates in order to apply the fix.