CVE-2021-26073
Atlassian Connect Express ACE Server-to-Server JWT Context JWT Bypass
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.
INFO
Published Date :
April 16, 2021, 3:15 a.m.
Last Modified :
Feb. 12, 2025, 9:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26073.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26073 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26073
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26073 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26073 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 12, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N Added CWE CWE-287 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference 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 Added Reference https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 Added Reference https://security.netapp.com/advisory/ntap-20210604-0004/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Atlassian 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 [No types assigned] Removed Reference Atlassian https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 -
Modified Analysis by [email protected]
Mar. 01, 2022
Action Type Old Value New Value Removed CWE NIST CWE-863 Added CWE NIST CWE-287 -
CVE Modified by [email protected]
Feb. 23, 2022
Action Type Old Value New Value Changed 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. 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. -
Modified Analysis by [email protected]
Jun. 08, 2021
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20210604-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20210604-0004/ Third Party Advisory -
CVE Modified by [email protected]
Jun. 04, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210604-0004/ [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 23, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N Changed Reference Type https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 Broken Link https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 Issue Tracking, Vendor Advisory Changed Reference Type https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 No Types Assigned https://confluence.atlassian.com/pages/viewpage.action?pageId=1051986099 Vendor Advisory Added CWE NIST CWE-863 Added CPE Configuration OR *cpe:2.3:a:atlassian:connect_express:*:*:*:*:*:node.js:*:* versions from (including) 3.0.2 up to (excluding) 6.6.0 -
CVE Modified by [email protected]
Apr. 16, 2021
Action Type Old Value New Value Removed Reference https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 [Broken Link] Added Reference https://community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-a[…]ypass-of-app-qsh-verification-via-context-jwts/47072 [Broken Link]
Vulnerability Scoring Details
Base CVSS Score: 7.7
Base CVSS Score: 4
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.34 }} 0.11%
score
0.56399
percentile