CVE-2021-26077: Critical severity atlassian connect spring boot vulnerability
Broken Authentication in Atlassian Connect Spring Boot (ACSB) in version 1.1.0 before 2.1.3 and from version 2.1.4 before 2.1.5: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions 1.1.0 before 2.1.3 and versions 2.1.4 before 2.1.5 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-2021-26077?
CVE-2021-26077 is classified as a critical vulnerability due to its potential impact on authentication mechanisms in affected software.
How do I fix CVE-2021-26077?
To fix CVE-2021-26077, you should upgrade Atlassian Connect Spring Boot to version 2.1.5 or later.
What versions of Atlassian Connect Spring Boot are affected by CVE-2021-26077?
CVE-2021-26077 affects versions 1.1.0 through 2.1.3 and from 2.1.4 up to but not including 2.1.5.
What type of vulnerability is CVE-2021-26077?
CVE-2021-26077 is a broken authentication vulnerability that allows for potential bypass of app QSH verification.
Is there a workaround for CVE-2021-26077?
There are no suggested workarounds; the only mitigative action is to upgrade to a secure version.