[wp-trac] [WordPress Trac] #59995: Taxonomy: Check for empty term after DB sanitization in wp_insert_term

[WordPress Trac]

#59995: Taxonomy: Check for empty term after DB sanitization in wp_insert_term
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 Reporter:  fgiannar      |      Owner:  fgiannar
     Type:  defect (bug)  |     Status:  assigned
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Taxonomy      |    Version:
 Severity:  major         |   Keywords:
  Focuses:                |
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 When inserting a new term in the database, `wp_insert_term` will check if
 the term is empty and return a corresponing error.

 Afterwards the term is sanitized and inserted in the database. However,
 there's a chance the term is empty after the DB sanitization.

 This is never checked though and will result in 1) empty terms in the DB
 and 2) possible OOM issues in `wp_insert_term` when checking if the term
 name matches an existing one because of using `get_terms` with an empty
 name argument

 Example: `wp_insert_term( '<script>Yo</script>', 'post_tag' )`;

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Ticket URL: <https://core.trac.wordpress.org/ticket/59995>
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