Child pages
  • CVE-2020-26074 - Broken authentication in Atlassian Connect Spring Boot (ACSB)
Skip to end of metadata
Go to start of metadata


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 between 1.1.0 - 2.1.2 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. This is fixed in version 2.1.3.

Affected versions

  • 1.1.0 - 2.1.2

Fixed versions

  • 2.1.3 and later


This is an independent assessment and you should evaluate its applicability to your own IT environment.

CVSS v3 score: 9.1 => Critical severity

Exploitability Metrics

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone

Scope Metric


Impact Metrics


  • No labels