Lack of data validation - Emails

Description

The application does not control that server-side emails used to register users do not belong to disposable mailboxes such as yopmail.

Impact

Reset passwords for registered users with disposable mailboxes.

Recommendation

Implement a blacklisting system with disposable mailbox domains or implement federated authentication.

Threat

Anonymous attacker from the Internet using enumerated users.

Expected Remediation Time

⌚ minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the src.

Base

• Attack vector: N
• Attack complexity: H
• Privileges required: N
• User interaction: N
• Scope: U
• Confidentiality: L
• Integrity: L
• Availability: L

Temporal

• Exploit code madurity: X
• Remediation level: W
• Report confidence: X

Result

• Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:W/RC:X
• Score:
  • Base: 5.6
  • Temporal: 5.5
• Severity:
  • Base: Medium
  • Temporal: Medium

Requirements

• 173.Discard unsafe inputs
• 320.Avoid client-side control enforcement
• 342.Validate request parameters

Fixes

• Elixir
• Scala
• Python
• Ruby
• Go
• Dart
• Swift
• Java
• C-Sharp
• PHP
• TypeScript

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