CVEvulnerability

CVE-2025-59028

7.5 HIGH Published 2026-03-27 Modified 2026-10-07 Official page ↗
Status
Analyzed
Published
2026-03-27
Last modified
2026-10-07
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-20

Description

When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy perfomance penalty on large deployments). No publicly available exploits are known.

Affected configurations

• dovecot dovecot (< 2.4.3) • open-xchange dovecot (< 3.1.2)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References