Graylog Web Interface 2.2.3 edit cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in Graylog Web Interface 2.2.3. This affects an unknown part of the file the '/system/authentication/users/edit/. Executing a manipulation can lead to cross site scripting. This vulnerability is registered as CVE-2026-1437. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Graylog Web Interface 2.2.3. It has been declared as problematic. This vulnerability affects an unknown functionality of the file the '/system/authentication/users/edit/. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation of this vulnerability may allow script execution in the victim's browser and limited manipulation of the affected user's session context, through the '/system/authentication/users/edit/' endpoint.

The weakness was published by Julen Garrido Estévez. The advisory is shared for download at incibe.es. This vulnerability was named CVE-2026-1437 since 01/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

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

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0458). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Open Source Graylog

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Vendor

• Graylog

Name

• Web Interface

Version

• 2.2.3

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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