CVE-2025-49643
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-01

Last updated on: 2026-02-06

Assigner: Zabbix

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.
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Meta Information
Published
2025-12-01
Last Modified
2026-02-06
Generated
2026-06-16
AI Q&A
2025-12-01
EPSS Evaluated
2026-06-15
NVD
CVE-2025-49643
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
zabbix frontend From 7.4.0 (inc) to 7.4.3 (inc)
zabbix zabbix 4.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-405 The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."
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Executive Summary

This vulnerability allows any authenticated Zabbix user, including the Guest user, to send specially crafted parameters to the /imgstore.php endpoint. Doing so causes a disproportionate CPU load on the webserver, which can lead to a denial of service condition.

Impact Analysis

The vulnerability can impact you by causing the webserver hosting Zabbix to experience high CPU usage, potentially making the service unavailable or significantly degraded. This denial of service can disrupt monitoring and management functions provided by Zabbix.

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