CVE-2022-41352
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 20 Oct 2022
- Used in ransomware campaigns
Description
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.
Key facts
- Published
- 26 Sep 2022
- Last changed
- 10 Sep 2026
- Assigned by
- mitre
- KEV added
- 20 Oct 2022
- KEV fix due
- 10 Nov 2022
- Used in ransomware
- Yes, according to CISA
- EPSS
- 95.478% likely to be exploited in the next 30 days, higher than 99.871% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 26 Sep 2022 Published
- 20 Oct 2022 CVE-2022-41352 added to CISA KEV
- 20 Oct 2022 Added to the CISA KEV catalogue
Weakness
Practice this bug class
HackZoneLabs has a hands-on lab on Path traversal (CWE-22).