CVE-2021-26073: High severity atlassian connect express vulnerability
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 between 3.0.2 - 6.5.0 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.
Other sources
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-26073?
CVE-2021-26073 is classified as a medium severity vulnerability due to broken authentication.
How do I fix CVE-2021-26073?
To fix CVE-2021-26073, upgrade Atlassian Connect Express to version 6.6.0 or later.
What impact does CVE-2021-26073 have on my application?
CVE-2021-26073 may allow unauthorized access and manipulation of Atlassian Connect apps due to broken authentication.
Which versions of Atlassian Connect Express are affected by CVE-2021-26073?
CVE-2021-26073 affects Atlassian Connect Express versions from 3.0.2 up to but not including 6.6.0.
Is CVE-2021-26073 being actively exploited?
There is currently no publicly available information indicating active exploitation of CVE-2021-26073.