Business rules manual
RGAA v4.0.0
Theme 1: Images
Rule 1.5.2

Rule 1.5.2

Summary

This test consists in detecting buttons associated with an image used as a CAPTCHA.

Business description

Criterion

1.5

Test

1.5.2

Description

Chaque bouton associé à une image (balise input avec l’attribut type="image") utilisée comme CAPTCHA vérifie-t-il une de ces conditions ?

  • Il existe une autre forme de CAPTCHA non graphique, au moins.
  • Il existe une autre solution d’accès à la fonctionnalité sécurisée par le CAPTCHA.

Level

A

Technical description

Scope

Page

Decision level

Semi-Decidable

Algorithm

Selection

Set1

All the <input> tags with a type attribute equals to “image” (css selector : input[type=image])

Set2

All the elements of Set1 identified as a CAPTCHA (see Notes for details about CAPTCHA characterisation).

Process

Test1

For each element of Set2, raise a MessageA

MessageA
  • code: CheckCaptchaAlternativeAccess
  • status: Pre-Qualified
  • parameter: tag name, snippet
  • present in source: yes

Analysis

Pre-qualified

At least one <input> tags with a type attribute equals to “image” identified as a CAPTCHA has been found on the page (Set2 is not empty)

Not Applicable

No <input> tag with a type attribute equals to “image” identified as a CAPTCHA has been found on the page (Set2 is empty)

Notes

An element is identified as a CAPTCHA when the “captcha” occurrence is found :

  • on one attribute of the element
  • or within the text of the element
  • or on one attribute of one parent of the element
  • or within the text of one parent of the element
  • or on one attribute of a sibling of the element
  • or within the text of a sibling of the element

Files

Rule 1.5.1Rule 1.6.1