Vulnerability · Published Dec 1, 2025 · Assigned by Zabbix
CVE-2025-49643Frontend DoS vulnerability due to asymmetric resource consumption
Medium 6.0
In plain English
A medium-severity security flaw in Zabbix from Zabbix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.0Medium
Exploit odds (30 days)0.4%top 69.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.22 | zabbix | 7.2.13-r0 | ALPINE-CVE-2025-49643 |
| Alpine:v3.23 | zabbix | 7.4.3-r0 | ALPINE-CVE-2025-49643 |
| Alpine:v3.24 | zabbix | 7.4.3-r0 | ALPINE-CVE-2025-49643 |
| Debian:12 | zabbix | no fix listed | DEBIAN-CVE-2025-49643 |
| Debian:13 | zabbix | 1:7.0.22+dfsg-1~deb13u1 | DEBIAN-CVE-2025-49643 |
| Debian:14 | zabbix | 1:7.0.22+dfsg-1 | DEBIAN-CVE-2025-49643 |
| Ubuntu:25.10 | zabbix | no fix listed | UBUNTU-CVE-2025-49643 |
| Ubuntu:26.04:LTS | zabbix | no fix listed | UBUNTU-CVE-2025-49643 |
| Ubuntu:26.10 | zabbix | no fix listed | UBUNTU-CVE-2025-49643 |
Affected products (as reported)
Weakness: CWE-405 · 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