Server-Side Request Forgery (SSRF) in Zimbra Collaboration - #VU144527
Published: August 21, 2026
Vulnerability identifier: #VU144527
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to send requests to unintended internal or external resources.
The vulnerability exists due to server-side request forgery in the Nextcloud integration when processing user-supplied resource requests. A remote attacker can submit crafted requests to send requests to unintended internal or external resources.
Affected software
Zimbra Collaboration
Remediation
Install security update from vendor's website.
Zimbra Collaboration - update to 10.1.20