CVE-2021-26073
7.7 · HIGHOverview
CVE-2021-26073 is a high-severity vulnerability affecting atlassian connect_express. It was published on April 16, 2021 and has a CVSS 3.1 base score of 7.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from atlassian. Update connect_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| atlassian | connect_express | >= 3.0.2, < 6.6.0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-26073?
CVE-2021-26073 is a high-severity vulnerability affecting atlassian connect_express. It was published on April 16, 2021 and has a CVSS 3.1 base score of 7.7 (HIGH).
How severe is CVE-2021-26073?
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-26073?
Check the references section for vendor advisories and patches from atlassian. Update connect_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-26073?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-26073 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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