Zabbix up to 7.4.11 OAuth Form import window.open Authorization endpoint value improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in Zabbix up to 7.4.11. Affected by this issue is the function window.open of the file Import of the component OAuth Form. Executing a manipulation of the argument Authorization endpoint value can lead to improper authorization. This vulnerability is registered as CVE-2026-59788. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in Zabbix up to 7.4.11 and classified as problematic. This vulnerability affects the function window.open of the file import of the component OAuth Form. The manipulation of the argument Authorization endpoint value with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at support.zabbix.com. This vulnerability was named CVE-2026-59788 since 07/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/05/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Network Management Software

Name

• Zabbix

Version

• 7.4.0
• 7.4.1
• 7.4.2
• 7.4.3
• 7.4.4
• 7.4.5
• 7.4.6
• 7.4.7
• 7.4.8
• 7.4.9
• 7.4.10
• 7.4.11

License

• open-source

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