CVE-2022-41352

CVE-2022-41352 is a critical-severity vulnerability in Synacor Zimbra Collaboration Suite with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-10-20). The underlying weakness is classified as CWE-22.

Key facts

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.

Frequently asked questions

What is CVE-2022-41352?
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.
How severe is CVE-2022-41352?
CVE-2022-41352 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-41352 being actively exploited?
Yes. CVE-2022-41352 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-10-20, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-41352?
CVE-2022-41352 primarily affects Synacor Zimbra Collaboration Suite. In total, 63 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-41352?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-41352 have an EU (EUVD) identifier?
Yes. CVE-2022-41352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-44557. It is also flagged as exploited in the EUVD (since 2022-10-20).
When was CVE-2022-41352 published?
CVE-2022-41352 was published on 2022-09-26 and last updated on 2026-06-17.

References

Affected products (63)

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