CVE-2025-53645 – Zimbra Collaboration Suite Denial of Service Vulnerability

The following table lists the changes that have been made to the
CVE-2025-53645 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jul. 09, 2025

    Action Type Old Value New Value
    Added Description Zimbra Collaboration Suite (ZCS) before 9.0.0 Patch 46, 10.0.x before 10.0.15, and 10.1.x before 10.1.9 is vulnerable to a denial of service condition due to improper handling of excessive, comma-separated path segments in both the Webmail interface and the Admin Console. An unauthenticated remote attacker can send specially crafted GET requests that trigger redundant processing and inflated responses. This leads to uncontrolled resource consumption, resulting in denial of service.
    Added Reference https://wiki.zimbra.com/wiki/Security_Center
    Added Reference https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.15#Security_Fixes
    Added Reference https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.9#Security_Fixes
    Added Reference https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P46#Security_Fixes
    Added Reference https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
    Added Reference https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
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