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CVE-2026-23928

Stored XSS vulnerability in the Item history/Plain text widget

Description

The Item history widget (in Zabbix 7.0+) or the Plain text widget (in Zabbix 6.0) can execute injected JavaScript when HTML display is enabled. This can allow an attacker to perform unauthorized actions depending on which user opens a dashboard containing these widgets. The malicious JavaScript would have to come from a monitored host controlled by the attacker. Note: the Item history widget is a replacement for the Plain text widget since Zabbix 7.0.

Timeline

  1. ID reserved

    By Zabbix

  2. · 4 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-2026-23928, by who scored it
Scored byCVSSScoreVector
ZabbixCNA (assigner)4.0High7.3CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
NVDNVD · Analyzed4.0High7.3CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/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)
0.26% · top 82% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.

Affected products

  • Zabbix · Zabbix

    • affected 6.0.0 – ≤ 6.0.44
    • affected 7.0.0 – ≤ 7.0.23
    • affected 7.4.0 – ≤ 7.4.7

What to do

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

Workaround: Do not use HTML display in Item history/Plain text widget or disable this widget entirely in Administration -> General -> Modules (Zabbix 7.0+).

References

References1

Sources

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

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Record last updated .