CVE-2012-2055
GitHub Enterprise before 20120304 does not properly restrict the use of a hash to provide values for a model’s attributes, which allows remote attackers to set the public_key[user_id] value via a modified URL for the public-key update form, related to a "mass assignment" vulnerability.
Date published : 2012-04-04
https://github.com/blog/1068-public-key-security-vulnerability-and-mitigation