CVE-2021-26077

2021-05-0700:00:00

atlassian

www.cve.org

8.9 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

45.8%

JSON

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.

CNA Affected

[
  {
    "product": "Atlassian Connect Spring Boot (ACSB)",
    "vendor": "Atlassian",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "1.1.0",
        "versionType": "custom"
      },
      {
        "lessThan": "2.1.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "2.1.4",
        "versionType": "custom"
      },
      {
        "lessThan": "2.1.5",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]