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Atlassian Bitbucket Server < 4.0.0 CSRF/XSRF



The remote Bitbucket server is affected by a Cross-Site Request Forgery (CSRF/XSRF) attack vector.


Versions of Bitbucket prior to 4.0.0 contain a flaw as HTTP requests do not require multiple steps, explicit confirmation, or a unique token when performing certain sensitive actions. By tricking a user into following a specially crafted link, a context-dependent attacker can perform a CSRF/XSRF attack causing the victim to make changes to project avatars.


Upgrade to Bitbucket version 4.0.0 or later.