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CVE-2021-26073

Quick assessment

Affected
Atlassian Atlassian Connect Express (ACE)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Bitbucket atlassian-connect-express是Bitbucket开源的一个应用软件。用于使用Node.js创建基于Atlassian Connect的应用程序的工具包。 Bitbucket atlassian-connect-express 3.0.2版本至6.6.0版本存在安全漏洞，攻击者可利用该漏洞向应用程序发送经过身份验证的重新安装事件。

AI Predicted 5.9 Difficulty: Easy EPSS 0.92% · P57

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26073

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Bitbucket atlassian-connect-express 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bitbucket atlassian-connect-express是Bitbucket开源的一个应用软件。用于使用Node.js创建基于Atlassian Connect的应用程序的工具包。 Bitbucket atlassian-connect-express 3.0.2版本至6.6.0版本存在安全漏洞，攻击者可利用该漏洞向应用程序发送经过身份验证的重新安装事件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Atlassian Connect Express (ACE) 3.0.2 ~ unspecified -

II. Public POCs for CVE-2021-26073

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III. Intelligence Information for CVE-2021-26073

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Vendor Advisories for CVE-2021-26073 (1)

Other References for CVE-2021-26073 (2)

IV. Related Vulnerabilities

Same vendor: Atlassian

V. Comments for CVE-2021-26073

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