[wp-trac] [WordPress Trac] #64489: Admin Ajax: Improve action input sanitization with sanitize_key()

[WordPress Trac]

#64489: Admin Ajax: Improve action input sanitization with sanitize_key()
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 Reporter:  mohammadzaid  |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Security      |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:
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Comment (by mohammadzaid):

 Thank you for the feedback, @westonruter. You're absolutely right. I
 hadn't accounted for dynamic hook names using special characters like
 slashes or dots.

 My goal was to add a layer of sanitization to the action input. Given that
 sanitize_key() is too restrictive, would sanitize_text_field() or a custom
 regex allowing "/" and "." be a better approach here, or should we avoid
 restricting the action string entirely to maintain backward compatibility?

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Ticket URL: <https://core.trac.wordpress.org/ticket/64489#comment:5>
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