What’s Vulnerable › Vulnerabilities
CVE-2025-49643: Frontend DoS vulnerability due to asymmetric resource consumption
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-01 · updated 2026-09-26
- Weakness: CWE-405
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.
Affected products
- Zabbix Frontend: from 6.0.0 before 6.0.42; from 7.0.0 before 7.0.19; from 7.2.0 before 7.2.13; from 7.4.0 before 7.4.3 — fixed in 6.0.42, 7.0.19, 7.2.13, 7.4.3
How to fix
Upgrade to a fixed version: Zabbix Frontend 6.0.42, 7.0.19, 7.2.13, 7.4.3. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2025-49643 or the next vulnerability affects your stack