Authentication Flaw in Atlassian Connect Spring Boot by Atlassian
CVE-2021-26074

6.5MEDIUM

Key Information:

Vendor

Atlassian
Status
Atlassian Connect Spring Boot (acsb)
Vendor
CVE Published:
16 April 2021

What is CVE-2021-26074?

The Atlassian Connect Spring Boot (ACSB) framework, used for creating Atlassian Connect apps, exhibits a significant security flaw. Versions from 1.1.0 to 2.1.2 incorrectly validate context JSON Web Tokens (JWTs) on lifecycle endpoints intended for server-to-server JWTs only. This misconfiguration allows unauthorized attackers to exploit the flaw, enabling them to send legitimized re-installation events to the app, compromising the integrity of the Atlassian products' authentication mechanisms.

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Affected Version(s)

Atlassian Connect Spring Boot (ACSB) 1.1.0

Atlassian Connect Spring Boot (ACSB) < 2.1.3

References

https://confluence.atlassian.com/pages/viewpage.action?pa...
x_refsource_MISC
https://community.developer.atlassian.com/t/action-requir...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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