There was an argument injection vulnerability in Sourcetree for Windows via Mercurial repository tag name that is going to be deleted. An attacker with permission to create a tag on a Mercurial repository linked in Sourcetree for Windows is able to exploit this issue to gain code execution on the system.

Affected versions:

• All versions of SourceTree for Windows before version 2.5.5.0

Fix:

• Upgrade SourceTree for Windows to version 2.5.5.0 or higher from https://www.sourcetreeapp.com/

Acknowledgements
Atlassian would like to credit Zhang Tianqi @ Tophant for reporting this issue to us.

For additional details see the full advisory.