Zimbra Collaboration fixes 1 vulnerability

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[TLP:CLEAR] Zimbra Collaboration fixes 1 vulnerability

Zimbra Collaboration versions 9.0.0 Patch 46 [1], 10.0.15 [2] and 10.1.9 [3] fix 1 vulnerability.

Zimbra Collaboration - DoS (CVE-2025-53645)

CVSS 7.5 (High)

An unauthenticated remote attacker is, by sending specially crafted GET requests, allowed to trigger excessive processing and large responses, leading to uncontrolled resource consumption and subsequent denial of service [4].

The vulnerability is present in product:

Zimbra Collaboration Suite; <9.0.0 Patch 46; >=10.0.0, <10.0.15; >=10.1.0, <10.1.9

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

More information:

CVE-2025-53645 at cve.org, NVD
CWE-400: Uncontrolled Resource Consumption at cwe.mitre.org

The vulnerability was publicly disclosed 9. 7. 2025.

Links

By CESNET, z.s.p.o. Michaela Jarošová on 11. 7. 2025.

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[TLP:CLEAR] Zimbra Collaboration fixes 1 vulnerability

Zimbra Collaboration - DoS (CVE-2025-53645)

CVSS 7.5 (High)

Links