CVE-2023-27582 CRITICAL

CVE-2023-27582: Full authentication bypass if SASL authorization username is specified

Vendor Foxcpp
Product maddy
Weakness CWE-287 · Improper authentication
Published March 13, 2023
Last update February 25, 2025
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

maddy is a composable, all-in-one mail server. Starting with version 0.2.0 and prior to version 0.6.3, maddy allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified username, it is accepted as is after checking the credentials for the authentication username. maddy 0.6.3 includes the fix for the bug. There are no known workarounds.

Key dates

02Disclosure timeline

March 13, 2023 CVE published
February 25, 2025 Record updated