CVE-2022-27925
Published: 21 April 2022
Summary
CVE-2022-27925 is a high-severity Path Traversal (CWE-22) vulnerability in Synacor Zimbra Collaboration Suite. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 0.0% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
Zimbra Collaboration Suite (ZCS) versions 8.8.15 and 9.0 contain a path traversal flaw in the mboximport component. The function accepts a ZIP archive from an authenticated caller and extracts its contents without properly sanitizing file paths, enabling an administrator to write arbitrary files outside the intended directory.
An attacker who already possesses administrator credentials can upload a crafted ZIP archive through the mboximport interface. Successful exploitation grants the ability to place files anywhere on the filesystem, which, given the CVSS vector (AV:N/AC:L/PR:H), can result in full control over confidentiality, integrity, and availability of the ZCS installation.
Zimbra’s security advisories and release notes direct administrators to apply the fixes shipped in the P24 patch for the 9.0 branch and corresponding updates for 8.8.15; the wiki pages also list the affected builds and the corrected versions.
The CVE carries an EPSS score that has reached a peak of 0.9732 and currently stands at 0.9431, reflecting sustained exploitation interest after disclosure. Public proof-of-concept material is available on Packet Storm, and Zimbra has published corresponding security-center entries.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-32413
Vulnerability details
Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. An authenticated user with administrator rights has the ability to upload arbitrary files to the system, leading to directory traversal.
- CWE(s)
- KEV Date Added
- 11 August 2022
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of all input data (ZIP paths) to reject malformed or traversal sequences before extraction occurs.
Mandates prompt installation of vendor patches (9.0.0 P24 and later) that eliminate the mboximport path-traversal flaw.
Enforces access restrictions on system-change operations, limiting which authenticated administrators may invoke the vulnerable mboximport upload function.