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CVE-2025-49643

Frontend DoS vulnerability due to asymmetric resource consumption

MEDIUM
6.5
CVSS Score
Published: December 1, 2025 at 01:05 PM UTC
Updated: September 26, 2026 at 12:27 AM UTC
2 products affected across 1 vendorFrontendZabbix

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Frontend· Zabbix
95%
6.0.0 ≤ v < 6.0.427.0.0 ≤ v < 7.0.197.2.0 ≤ v < 7.2.137.4.0 ≤ v < 7.4.3
Affected range stops below 6.0.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.2.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.4.3, so it looks safe — our inference, not a vendor statement
Zabbix· Zabbix
60%
6.0.0 ≤ v ≤ 6.0.417.0.0 ≤ v ≤ 7.0.187.2.0 ≤ v ≤ 7.2.127.4.0 ≤ v ≤ 7.4.26.0.07.0.07.2.07.4.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://support.zabbix.com/browse/ZBX-27284

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-405

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