Home/CVE/An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending sp
CVE

CVE-2025-49643

An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending sp

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.

MEDIUM · CVSS 6.5 EPSS 0.00102
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-405Asymmetric Resource Consumption (Amplification)
▤

Affected Products & Versions

4
zabbix frontend>= 6.0.0 and < 6.0.42
zabbix frontend>= 7.0.0 and < 7.0.19
zabbix frontend>= 7.2.0 and < 7.2.13
zabbix frontend>= 7.4.0 and < 7.4.3
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@zabbix.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Dec 2025 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.zabbix.com/browse/ZBX-27284Vendor Advisory
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