[wp-trac] [WordPress Trac] #60703: Improper Input Validation

[WordPress Trac]

#60703: Improper Input Validation
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 Reporter:  rakeshchavan                         |      Owner:  (none)
     Type:  defect (bug)                         |     Status:  new
 Priority:  normal                               |  Milestone:  Awaiting
                                                 |  Review
Component:  General                              |    Version:  6.4.3
 Severity:  normal                               |   Keywords:
  Focuses:  administration, template,            |
  performance, coding-standards                  |
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 URL http://demodomain.com/wp-admin/post-new.php
 Input validation on the CMS side.
 Assume all input is malicious. Use an "accept known good" input validation
 strategy, i.e., use a whitelist of acceptable inputs that strictly conform
 to specifications. Reject any input that does not strictly conform to
 specifications, or transform it into something that does. When performing
 input validation, consider all potentially relevant properties,
 including length, type of input, the full range of acceptable values,
 missing or extra inputs, syntax, consistency across related fields, and
 conformance to business rules. As an example of business rule logic,
 "boat" may be syntactically valid because it only contains alphanumeric
 characters, but it is not valid if the input is only expected to contain
 colors such as "red" or "blue." Do not rely exclusively on looking for
 malicious or malformed inputs (i.e., do not rely on a blacklist). A
 blacklist is likely to miss at least one undesirable input, especially if
 the code's environment changes. This can give attackers enough room to
 bypass the intended validation. However, blacklists can be useful for
 detecting potential attacks or determining which inputs are so malformed
 that they should be rejected outright.

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Ticket URL: <https://core.trac.wordpress.org/ticket/60703>
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