Broken Authentication in Atlassian Connect Express

ALTO 7.7CVE-2021-26073 · GHSA-4v96-m8xv-x83v · Published 16/04/2021 · updated 17/06/2026

In breve

CVE-2021-26073 è una vulnerabilità ALTO (CVSS 7.7) che riguarda connect express (atlassian), atlassian-connect-express.
Probabilità di sfruttamento nei prossimi 30 giorni (EPSS): 0.92%, superiore al 60.2% delle vulnerabilità.
Correzione: aggiornare a 6.6.0 o successiva.

Package	Affected versions	Patched versions
connect express atlassian	`≥ 3.0.2, < 6.6.0`	`6.6.0`
atlassian-connect-express npm	`≥ 3.0.2, < 6.6.0`	`6.6.0`

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 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.

NVD 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.

References

nvd.nist.gov/vuln/detail/CVE-2021-26073 · ADVISORY
community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072 · WEB
confluence.atlassian.com/pages/viewpage.action · WEB
security.netapp.com/advisory/ntap-20210604-0004 · WEB
bitbucket.org/atlassian/atlassian-connect-express · PACKAGE
security.netapp.com/advisory/ntap-20210604-0004 · Third Party Advisory

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Package

Affected versions

Patched versions

connect express

atlassian

≥ 3.0.2, < 6.6.0

6.6.0

atlassian-connect-express

npm

≥ 3.0.2, < 6.6.0

6.6.0

Description

NVD 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.