Security Advisory WSO2-2019-0656

Published: September 02, 2019

Severity: High

CVSS Score: 7.3 (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N)


  • WSO2 API Manager: 2.6.0
  • WSO2 Identity Server: 5.3.0 , 5.4.0 , 5.4.1 , 5.5.0 , 5.6.0 , 5.7.0


Improper Authentication and Authorization vulnerability has been identified in SCIM API in WSO2 Identity Server.


By obtaining a certificate from a trusted certificate authority, it is possible to bypass authorization if the root certificate authority used to sign is available in the client trust store.


Upon successful exploitation of this vulnerability, an unauthorized user would be able to invoke the SCIM API.


Upgrade the WSO2 Identity Server to 5.8.0 or a higher version, which is not affected by this vulnerability.

For other products

Apply the following patches based on your product version by following the instructions in the README file. If you have any questions, post them to

Download the relevant patches based on the products you use following the matrix below. Patches can also be downloaded from Security Patch Releases.

Code Product Version Patch
APIM WSO2 API Manager 2.6.0 WSO2-CARBON-PATCH-4.4.0-4153


If you are a WSO2 customer with a support subscription, use WSO2 Update Manager (WUM) updates in order to apply the fix. This patch is intended for WSO2 community (free) users.

If you are using newer versions of the products than the ones mentioned in the SOLUTION section, this vulnerability is fixed.