Detections
Analytics

Zabbix 7.0.x < 7.0.24 / 7.4.x < 7.4.8 XSS (ZBX-27758)

high Nessus Plugin ID 314955

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Synopsis

A monitoring application installed on the remote host is affected by a cross-site scripting vulnerability.

Description

The version of Zabbix Server installed on the remote host is prior to 7.0.24, 7.4.8. It is, therefore, affected by a stored cross-site scripting (XSS) vulnerability. An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Zabbix version 7.0.24, 7.4.8 or later.

See Also

https://support.zabbix.com/browse/ZBX-27758

Plugin Details

Severity: High

ID: 314955

File Name: zabbix_ZBX-27758.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 5/15/2026

Updated: 5/18/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2026-23926

CVSS v3

Risk Factor: High

Base Score: 8

Temporal Score: 7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.3

Threat Score: 4.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/a:zabbix:zabbix_server

Required KB Items: installed_sw/Zabbix Server

Exploit Ease: No known exploits are available

Patch Publication Date: 5/6/2026

Vulnerability Publication Date: 5/6/2026

Reference Information

CVE: CVE-2026-23926

IAVA: 2026-A-0438