CVE-2021-26073 Information

Description

Broken Authentication in Atlassian Connect Express (ACE) from version 3.0.2 before version 6.6.0: Atlassian Connect Express is a Node.js package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Express app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Express versions from 3.0.2 before 6.6.0 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted permitting an attacker to send authenticated re-installation events to an app.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Reference

https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 https://security.netapp.com/advisory/ntap-20210604-0004/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.7