The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source
to version 871.v28d74e8b_4226 or higher.
org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source is a package that allows to discover and build Bitbucket Cloud and Bitbucket Server pull requests and branches and send status notifications with the build result.
Affected versions of this package are vulnerable to Improper Authorization such that Multibranch Pipelines with Bitbucket branch source can be configured to discover pull requests from forks. The trust policy is set to "Forks in the same account" by default.
This trust policy allows changes to Jenkinsfiles from users without write access to the project when using Bitbucket Server. This allows attackers able to submit pull requests from forks to change the Pipeline behavior.
Note:
Pipelines using Bitbucket Cloud are unaffected by this issue.