Improper Authorization org.springframework.security:spring-security-core Dependency in Bitbucket Data Center and Server

This High severity org.springframework.security:spring-security-core Dependency vulnerability was introduced in versions 8.0.0, 8.1.0, 8.2.0, 8.3.0, 8.4.0, 8.5.0, 8.6.0, 8.7.0, 8.8.0, 8.9.0, 8.10.0, 8.11.0, 8.12.0, 8.13.0, 8.14.0-eap01, 8.15.0, 8.16.0, 8.17.0, 8.18.0, and 8.19.0 of Bitbucket Data Center and Server. This includes versions earlier than 8.0.0.

This org.springframework.security:spring-security-core Dependency vulnerability, with a CVSS Score of 8.2 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N allows an unauthenticated attacker to expose assets in your environment susceptible to exploitation which has high impact to confidentiality, low impact to integrity, no impact to availability, and requires no user interaction.

h2. Data Center

Atlassian recommends that Bitbucket Data Center customers upgrade to the latest version. If you are unable to do so, upgrade your instance to one of the specified supported fixed versions:

||Affected versions||Fixed versions||
|8.18.0|8.19.1 (LTS) recommended|
|8.17.0 to 8.17.1|8.19.1 (LTS) recommended|
|8.16.0 to 8.16.2|8.19.1 (LTS) recommended|
|8.15.0 to 8.15.3|8.19.1 (LTS) recommended|
|8.14.0 to 8.14.4|8.19.1 (LTS) recommended|
|8.13.0 to 8.13.5|8.19.1 (LTS) recommended|
|8.12.0 to 8.12.3|8.19.1 (LTS) recommended|
|8.11.0 to 8.11.1|8.19.1 (LTS) recommended|
|8.10.0 to 8.10.1|8.19.1 (LTS) recommended|
|8.9.0 to 8.9.11 (LTS{}){}|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.8.0 to 8.8.7|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.7.0 to 8.7.5|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.6.0 to 8.6.4|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.5.0 to 8.5.4|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.4.0 to 8.4.4|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.3.0 to 8.3.4|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.2.0 to 8.2.4|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|8.1.0 to 8.1.5|8.19.1 (LTS) recommended or 8.9.12 (LTS)|
|Any other/earlier versions|8.19.1 (LTS) recommended or 8.9.12 (LTS)|

h2. Server

Atlassian recommends that Bitbucket Server customers upgrade to the latest version. If you are unable to do so, upgrade your instance to one of the specified supported fixed versions:

||Affected versions||Fixed versions||
|8.9.0 to 8.9.11 (LTS{}){}|8.9.12 (LTS)|
|8.8.0 to 8.8.7|8.9.12 (LTS)|
|8.7.0 to 8.7.5|8.9.12 (LTS)|
|8.6.0 to 8.6.4|8.9.12 (LTS)|
|8.5.0 to 8.5.4|8.9.12 (LTS)|
|8.4.0 to 8.4.4|8.9.12 (LTS)|
|8.3.0 to 8.3.4|8.9.12 (LTS)|
|8.2.0 to 8.2.4|8.9.12 (LTS)|
|8.1.0 to 8.1.5|8.9.12 (LTS)|
|Any other/earlier versions|8.9.12 (LTS)|

See the release notes ([https://confluence.atlassian.com/bitbucketserver/release-notes]). You can download the latest version of Bitbucket Data Center and Server from the download center ([https://www.atlassian.com/software/bitbucket/download-archives]).

The National Vulnerability Database provides the following description for this vulnerability: In Spring Security, versions 5.7.x prior to 5.7.12, 5.8.x prior to
5.8.11, versions 6.0.x prior to 6.0.9, versions 6.1.x prior to 6.1.8,
versions 6.2.x prior to 6.2.3, an application is possible vulnerable to
broken access control when it directly uses the AuthenticatedVoter#vote passing a null Authentication parameter.