CVE DATABASE / CVE-2022-41352
CVE-2022-41352
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
Confirmed exploited in the wild. Added 2022-10-20.
Federal remediation due 2022-11-10.
Required action: Apply updates per vendor instructions.
Summary
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.
CVSS 3.1 breakdown
| Base score | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
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References
- http://packetstormsecurity.com/files/169458/Zimbra-Collaboration-Suite-TAR-Path-Traversal.html
- https://forums.zimbra.org/viewtopic.php?t=71153&p=306532
- https://wiki.zimbra.com/wiki/Security_Center
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://www.secpod.com/blog/unpatched-rce-bug-in-zimbra-collaboration-suite-exploited-in-wild/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41352
Data: NIST NVD + CISA KEV. NVD last modified 2025-11-03. Always verify against the vendor advisory before acting.