Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-54006796-CF7B-11ED-A5D5-001B217B3468:
Gitlab reports:
Cross-site scripting in "Maximum page reached" page
Private project guests can read new changes using a fork
Mirror repository error reveals password in Settings UI
DOS and high resource consumption of Prometheus server through abuse of Prometheus integration proxy endpoint
Unauthenticated users can view Environment names from public projects limited to project members only
Copying information to the clipboard could lead to the execution of unexpected commands
Maintainer can leak masked webhook secrets by adding a new parameter to the webhook URL
Arbitrary HTML injection possible when :soft_email_confirmation feature flag is enabled in the latest release
Framing of arbitrary content (leading to open redirects) on any page allowing user controlled markdown
MR for security reports are available to everyone
API timeout when searching for group issues
Unauthorised user can add child epics linked to victim's epic in an unrelated group
GitLab search allows to leak internal notes
Ambiguous branch name exploitation in GitLab
Improper permissions checks for moving an issue
Private project branches names can be leaked through a fork
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