PT-2025-38083 · Zimbra · Zimbra Collaboration

Published 2025-09-16 · Updated 2025-09-20 · CVE-2025-54391

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Zimbra Collaboration (ZCS) (affected versions not specified)

Description A flaw exists in the EnableTwoFactorAuthRequest SOAP endpoint of Zimbra Collaboration (ZCS) that allows an attacker with valid user credentials to bypass Two-Factor Authentication (2FA) protection. An attacker can configure an additional 2FA method—either a third-party authenticator app or email-based 2FA—without presenting a valid authentication token or proving access to an already configured 2FA method. This bypasses 2FA, resulting in unauthorized access to accounts protected by 2FA.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2025-54391

Affected Products

Zimbra Collaboration

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-54391 · Security Note
• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories · Note
• https://t.me/cveNotify/135600 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1968073240816804126 · Twitter Post
• https://twitter.com/CVEnew/status/1969291988596887930 · Twitter Post
• https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy · Note
• https://wiki.zimbra.com/wiki/Security_Center · Note
• https://t.me/CVEtracker/32689 · Telegram Post