This High severity Third-Party Dependency vulnerability was introduced in versions 8.9.0, 8.19.0, and 9.2.0 of Bitbucket Data Center and Server.

This Third-Party Dependency vulnerability, with a CVSS Score of 7.4, allows an unauthenticated attacker to expose assets in your environment susceptible to exploitation which has high impact to confidentiality, high impact to integrity, no impact to availability, and requires no user interaction.

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

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).

If you are running external Java with Bitbucket and the java version is vulnerable as per CVE-2024-21147, make sure to update the Java to latest patched release from the respective Java maintainer.

This vulnerability was reported via our Atlassian (Internal) program.

The National Vulnerability Database provides the following description for this vulnerability: 

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Hotspot). Supported versions that are affected are Oracle Java SE: 8u411, 8u411-perf, 11.0.23, 17.0.11, 21.0.3, 22.0.1; Oracle GraalVM for JDK: 17.0.11, 21.0.3, 22.0.1; Oracle GraalVM Enterprise Edition: 20.3.14 and 21.3.10. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security.