craftcms / craftcms/cms

[5.x]: Creating users with same email address

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bug
Dominant language
PHP
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Forks
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Avg merge
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Merged PRs (30d)
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Description

What happened?
Description

You can add multiple users with the same email address. This creates various problems when having the config useEmailAsUsername. It is semi related to an earlier problem #15758 that has been fixed, but only when removing one of the activated users...

Steps to reproduce
  1. create 2 users with the same email adres and activate 1 of them
Expected behavior

Error handling when trying to create a second user with the same email

Actual behavior

Let's me create infinite users with a same email adres

Craft CMS version

Craft Pro 5.7.10

PHP version

8.4.7

Operating system and version

Linux 4.18.0-553.54.1.el8_10.x86_64

Database type and version

MySQL 8.0.42

Image driver and version

Imagick 3.8.0 (ImageMagick 7.1.1-43)

Installed plugins and versions

N/A

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue in Craft Pro 5.7.10 with useEmailAsUsername enabled, creating two users with the same email and activating one. Trace the user-creation validation and compare it with issue #15758; done means the second duplicate email is rejected with clear error handling and the behavior is covered by a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
mysql, php
Domain
authentication, databases
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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