How severe is CVE-2025-49643?

CVE-2025-49643 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-49643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-49643?

CVE-2025-49643 affects Zabbix Frontend. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-49643?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-49643 have an EU (EUVD) identifier?

Yes. CVE-2025-49643 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199985.

When was CVE-2025-49643 published?

CVE-2025-49643 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-49643

CVE-2025-49643 is a medium-severity vulnerability in Zabbix Frontend with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-405.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.0
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199985
Weakness: CWE-405
Affected product: Zabbix Frontend
Published: 2025-12-01
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-49643?: 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.
How severe is CVE-2025-49643?: CVE-2025-49643 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-49643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-49643?: CVE-2025-49643 affects Zabbix Frontend. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-49643?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-49643 have an EU (EUVD) identifier?: Yes. CVE-2025-49643 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199985.
When was CVE-2025-49643 published?: CVE-2025-49643 was published on 2025-12-01 and last updated on 2026-06-17.

References

https://support.zabbix.com/browse/ZBX-27284

Affected products (1)

cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*

More vulnerabilities in Zabbix Frontend

CVE-2023-32725 — Critical (CVSS 9.6): The website configured in the URL widget will receive a session cookie when testing or executing scheduled reports. The…
CVE-2023-29457 — Medium (CVSS 6.3): Reflected XSS attacks, occur when a malicious script is reflected off a web application to the victim's browser. The…
CVE-2023-29456 — Medium (CVSS 5.7): URL validation scheme receives input from a user and then parses it to identify its various components. The validation…
CVE-2023-29455 — Medium (CVSS 5.4): Reflected XSS attacks, also known as non-persistent attacks, occur when a malicious script is reflected off a web…
CVE-2023-29454 — Medium (CVSS 5.4): Stored or persistent cross-site scripting (XSS) is a type of XSS where the attacker first sends the payload to the web…
CVE-2022-43515 — Medium (CVSS 5.3): Zabbix Frontend provides a feature that allows admins to maintain the installation and ensure that only certain IP…

All CVEs affecting Zabbix Frontend →

Other CWE-405 vulnerabilities

CVE-2025-53633 — Critical (CVSS 9.8): Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. When decoding a scenario…
CVE-2021-38447 — High (CVSS 8.6): OCI OpenDDS versions prior to 3.18.1 are vulnerable when an attacker sends a specially crafted packet to flood target…
CVE-2025-42874 — High (CVSS 7.9): SAP NetWeaver remote service for Xcelsius allows an attacker with network access and high privileges to execute…
CVE-2026-47774 — High (CVSS 7.5): Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.35.11,…
CVE-2026-25611 — High (CVSS 7.5): A series of specifically crafted, unauthenticated messages can exhaust available memory and crash a MongoDB server.
CVE-2026-0485 — High (CVSS 7.5): SAP BusinessObjects BI Platform allows an unauthenticated attacker to send specially crafted requests that could cause…

Browse all CWE-405 vulnerabilities →