Actively exploited in the wild
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
Synacor - Zimbra Collaboration Suite (ZCS) · Listed in the CISA KEV since 2022-08-11. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2022-27925
HighCVSS 7.2KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
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.
Risk Assessment
An administrator (or someone with admin rights) can exploit the vulnerability to write files outside intended directories, potentially leading to privilege escalation or further compromise.
Recommendation
Apply Zimbra patches that fix this vulnerability and restrict administrator privileges.
Original NVD description (English source)
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.