CVE-2023-27582

Full authentication bypass if SASL authorization username is specified

State: Published
Severity: 9.1 Critical
Published: Mar 13, 2023
Updated: Feb 25, 2025
Reserved: Mar 4, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-287 Improper Authentication
CWE-305 Authentication Bypass by Primary Weakness

Affected Products

Product	Versions
maddyfoxcpp	>= 0.2.0 0.6.3Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.