Description

The system allows the plus character in the email registration process. An attacker could abuse this feature to create several accounts pointing to the same email.

Impact

Create multiple accounts with the same email.

Recommendation

The system must validate emails in such way that an inbox only can be associated or represent an account.

Threat

Anonymous attacker from the Internet.

Expected Remediation Time

⌚ 60 minutes.

Score

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

Base

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

Temporal

• Exploit code maturity: P
• Remediation level: U
• Report confidence: C

Result

• Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:U/RC:C
• Score:
• Base: 4.3
• Temporal: 4.1
• Severity:
• Base: Medium
• Temporal: Medium

Score 4.0

Default score using CVSS 4.0. It may change depending on the context of the src.

Base 4.0

• Attack vector: N
• Attack complexity: L
• Attack Requirements: N
• Privileges required: L
• User interaction: N
• Confidentiality (VC): N
• Integrity (VI): L
• Availability (VA): N
• Confidentiality (SC): N
• Integrity (SI): L
• Availability (SA): N

Threat 4.0

• Exploit maturity: P

Result 4.0

• Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:P
• Score:
• CVSS-BT: 2.1
• Severity:
• CVSS-BT: Low

Requirements

• 121.Guarantee uniqueness of emails

Fixes

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

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