What is CVE-2025-49643?

CVE-2025-49643 is a medium-severity vulnerability in Zabbix Frontend, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 6.5/10. Published 2025-12-01.

How severe is CVE-2025-49643?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Zabbix Frontend

CVE-2025-49643

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.

EPSS: 0.003 (22.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Zabbix Frontend
Zabbix — versions 6.0.0, 7.0.0, 7.2.0

Weakness classification (CWE)

CWE-405 — Asymmetric Resource Consumption (Amplification)

References

security@zabbix.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-49643?: CVE-2025-49643 is a medium-severity vulnerability in Zabbix Frontend, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 6.5/10. Published 2025-12-01.
How severe is CVE-2025-49643?: Medium severity. CVSS v3 base score is 6.5 out of 10.