SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-26074

Atlassian Connect Spring Boot versions from version 1.1.0 before version 2.1.3 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send…

MEDIUM 6.5EPSS 0.65%

Does this matter?

Lower severity and a low EPSS score (0.65%). Track it; it rarely justifies an emergency change on its own.

Description

Broken Authentication in Atlassian Connect Spring Boot (ACSB) from version 1.1.0 before version 2.1.3: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions from version 1.1.0 before version 2.1.3 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.

CVSS 3.1
6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
0.65% probability · 49th percentile
CISA KEV
Not listed
Weakness
CWE-287
Affected
atlassian/connect spring boot
Source
security@atlassian.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.