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pullrequests: prevent XSS when 'Potential Reviewers' are selected and first and last names cannot be trusted
The user information passed to autocompleteFormatter from select2 is the raw
data which might contain HTML markup controlled by the user.
That could cause XSS issues, already when adding rogue users as reviewers on a PR.
To avoid that, make sure select2 use the default escapeMarkup function. In
addReviewMember, use .html_escape when expanding the reviewer template.
The user information passed to autocompleteFormatter from select2 is the raw
data which might contain HTML markup controlled by the user.
That could cause XSS issues, already when adding rogue users as reviewers on a PR.
To avoid that, make sure select2 use the default escapeMarkup function. In
addReviewMember, use .html_escape when expanding the reviewer template.