CVE-2025-49643

Frontend DoS vulnerability due to asymmetric resource consumption

Published Dec 1, 2025 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending specially crafted parameters to /imgstore.php, leading to potential denial of service.

Remediation

Vendor Solution

Update the affected components to their respective fixed versions.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Zabbix frontend
CPEs cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*
Vendors & Products Zabbix frontend
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
First Time appeared Zabbix
Zabbix zabbix
Vendors & Products Zabbix
Zabbix zabbix
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending specially crafted parameters to /imgstore.php, leading to potential denial of service.
Title Frontend DoS vulnerability due to asymmetric resource consumption
Weaknesses CWE-405
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Zabbix
Published
Updated
Dec 1, 2025, 2:34 PM
Reserved
Jun 9, 2025, 12:23 PM
Status
Analyzed
Published
Dec 1, 2025, 2:16 PM
Modified
Sep 26, 2026, 12:10 AM