CVE-2026-59788 PUBLISHED

Stored XSS vulnerability in OAuth configuration form

Assigner: Zabbix
Reserved: 07.07.2026 Published: 05.10.2026 Updated: 05.10.2026

The email media type OAuth form passes the Authorization endpoint value to window.open() without validating the URL scheme, so a javascript: URL is executed in the browser. This means a crafted media type configuration, deliverable as an import file, runs arbitrary JavaScript as the Super Admin who grants consent.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	High
User Interaction	Active

CVSS 4.0

Product Status

Vendor	Zabbix
Product	Zabbix
Versions	Default: unknown affected from 7.4.0 to 7.4.11 (incl.)

Affected Configurations

Super Admin opening an attacker-supplied media type import file.

Workarounds

Don't import media type configurations from untrusted sources.

Solutions

Update the affected components to their respective fixed versions.

References

https://support.zabbix.com/browse/ZBX-28198

Problem Types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

CAPEC-592: Stored XSS