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VULNERABILITIES

CVE-2021-26073 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
CNA: CISA-ADPCVSS-B:7.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072 CVE
https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 CVEVendor Advisory
https://security.netapp.com/advisory/ntap-20210604-0004/ CVEThird Party Advisory
https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a%5B%E2%80%A6%5Dypass-of-app-qsh-verification-via-context-jwts/47072 [email protected]
https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 [email protected]Vendor Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-287Improper Authentication[email protected]
CWE-287Improper AuthenticationCISA-ADP

Affected Products

ProductVersions
atlassian connect express
>= 3.0.2, < 6.6.0

CPE

  • cpe:2.3:a:atlassian:connect_express:*:*:*:*:*:node.js:*:*

Remediation

  • No remediation found in references.

Change History

12 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-26073
NVD Published Date:
Apr 16, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-26073 Details - Not Deferred