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PHP CVE-2025-49643

| EUVDEUVD-2025-199985 MEDIUM
Asymmetric Resource Consumption (Amplification) (CWE-405)
2025-12-01 security@zabbix.com
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
qualitative
SUSE
MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 15, 2026 - 13:34 euvd
EUVD-2025-199985
Analysis Generated
Mar 15, 2026 - 13:34 vuln.today
CVE Published
Dec 01, 2025 - 14:16 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

Analysis

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.

Technical ContextAI

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users.

RemediationAI

Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.

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Vendor StatusVendor

Ubuntu

Priority: Medium
zabbix
Release Status Version
trusty needs-triage -
xenial needs-triage -
bionic needs-triage -
focal needs-triage -
jammy needs-triage -
noble DNE -
questing needs-triage -
upstream needs-triage -
plucky ignored end of life, was needs-triage

Debian

Bug #1121841
zabbix
Release Status Fixed Version Urgency
bullseye vulnerable 1:5.0.8+dfsg-1 -
bullseye (security) vulnerable 1:5.0.47+dfsg-0+deb11u1 -
bookworm vulnerable 1:6.0.14+dfsg-1 -
trixie fixed 1:7.0.22+dfsg-1~deb13u1 -
forky, sid fixed 1:7.0.22+dfsg-1 -
(unstable) fixed 1:7.0.22+dfsg-1 -

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server 12 SP5 Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
SUSE Linux Enterprise Server 12 SP3-BCL Fixed

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CVE-2025-49643 vulnerability details – vuln.today

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