CVE-2022-37042
Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 September 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 92.07% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 11 August 2022 · due 1 September 2022 · used in ransomware campaigns
- Weakness
- CWE-22
- Affected
- synacor/zimbra collaboration suite
- Source
- cve@mitre.org
EPSS 92.1% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://blog.zimbra.com/2022/08/authentication-bypass-in-mailboximportservlet-vulnerability/; https://nvd.nist.gov/vuln/detail/CVE-2022-37042
References
- http://packetstormsecurity.com/files/168146/Zimbra-Zip-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
- https://wiki.zimbra.com/wiki/Security_CenterPatch, Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- http://packetstormsecurity.com/files/168146/Zimbra-Zip-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
- https://wiki.zimbra.com/wiki/Security_CenterPatch, Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-37042US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.