cve.bz

CVE-2021-26077

8.8 highEPSS 1.0%

High (8.8) in atlassian connect spring boot. EPSS 1.0% chance of exploitation in the next 30 days. Fixed in com.atlassian.connect:atlassian-connect-spring-boot 2.1.3, 2.1.5.

Broken Authentication in Atlassian Connect Spring Boot (ACSB) in version 1.1.0 before 2.1.3 and from version 2.1.4 before 2.1.5: 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 1.1.0 before 2.1.3 and versions 2.1.4 before 2.1.5 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.

Severity

CVSS 3.1

8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
CWE
CWE-287
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-2x7v-w2mv-f3rxMavencom.atlassian.connect:atlassian-connect-spring-boot>=1.1.0 <2.1.32.1.3
GHSA-2x7v-w2mv-f3rxMavencom.atlassian.connect:atlassian-connect-spring-boot>=2.1.4 <2.1.52.1.5

References

Check your stackJSON