CVEvulnerability

CVE-2022-37042

9.8 CRITICAL Known exploited Published 2022-08-12 Modified 2026-08-04 Official page ↗

CISA Known Exploited Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability — Synacor Zimbra Collaboration Suite (ZCS)

Synacor Zimbra Collaboration Suite (ZCS) contains an authentication bypass vulnerability in MailboxImportServlet. This vulnerability was chained with CVE-2022-27925 which allows for unauthenticated remote code execution.

Added to KEV: 2022-08-11
Remediation due: 2022-09-01
Ransomware use: Known
Required action: Apply updates per vendor instructions.
Notes: https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/; https://nvd.nist.gov/vuln/detail/CVE-2022-37042

Status: Analyzed
Published: 2022-08-12
Last modified: 2026-08-04
Assigner: [email protected]
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-22

Description

Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execution. NOTE: this issue exists because of an incomplete fix for CVE-2022-27925.

Affected configurations

• synacor zimbra collaboration suite 8.8.15 • synacor zimbra collaboration suite 9.0.0

Weakness · CWE (1)

CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References