CVE-2025-49643

Frontend DoS vulnerability due to asymmetric resource consumption

6.0MediumCVSS base score
0.36%Exploitation in 30 daysEPSS · top 69% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

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.

Timeline

2025
9 Jun 2025
9 Jun 2025
ID reserved
By Zabbix
1 Dec 20256 months later
1 Dec 2025· 6 months later
Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2025-49643, by who scored it
Scored by	CVSS	Score	Vector
ZabbixCNA (assigner)	4.0	Medium6.0	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
NVDNVD · Analyzed	4.0	Medium6.0	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.36% · top 69% of all CVEs (11 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.

Affected products

Zabbix · Zabbix
- affected 6.0.0 – ≤ 6.0.41
- affected 7.0.0 – ≤ 7.0.18
- affected 7.2.0 – ≤ 7.2.12
- affected 7.4.0 – ≤ 7.4.2

What to do

Solution: Update the affected components to their respective fixed versions.

References1

https://support.zabbix.com/browse/ZBX-27284 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2025-49643](https://cveledger.app/badge/CVE-2025-49643.svg)](https://cveledger.app/cve/CVE-2025-49643)

Record last updated 1 Dec 2025, 14:34 UTC.