Input validation error in Zimbra Collaboration - CVE-2025-53645
Published: October 6, 2025
Vulnerability identifier: #VU116622
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-53645
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of excessive, comma-separated path segments in the Admin Console. A remote attacker can send specially crafted HTTP GET requests to the admin console and perform a denial of service (DoS) attack.
Affected software
Zimbra Collaboration
How to mitigate CVE-2025-53645
Install updates from vendor's website.
Zimbra Collaboration - addressed in versions 9.0.0 Patch 46, 10.0.15, 10.1.9