CVE-2025-53645
High
Description
Zimbra Collaboration (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 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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Collaboration (ZCS)
PublishedJul 9, 2025
First seenJul 9, 2025
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- Zimbra Collaboration (ZCS)9.0.0 Patch 46, 10.0.15, 10.1.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Zimbra Collaboration (ZCS) | No range specified, 10.0.x ≤ v, 10.1.x ≤ v | 9.0.0 Patch 46, 10.0.15, 10.1.9 |
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