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Published: 7th April 2021

Version: 1.0.0

Severity: Medium

CVSS Score: 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)


WSO2 API Manager : 3.1.0 , 3.2.0

WSO2 IS as Key Manager : 5.10.0

WSO2 Identity Server : 5.10.0


Reflected Cross-Site Scripting (XSS) vulnerability in the Authentication Endpoint.


Reflected XSS vulnerability can be exploited by tampering a request parameter in Authentication Endpoint. This can be performed in both authenticated and unauthenticated requests.


By leveraging the XSS attack, an attacker can make the browser get redirected to a malicious website, make changes in the UI of the web page, retrieve 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 receive security fixes.

You may also apply the relevant fixes based on the changes from the public fix: https://github.com/wso2/identity-apps/pull/1459

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


WSO2 thanks, Rodrigo Duarte Favarini Silva for responsibly reporting the identified issue and working with us as we addressed it.

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