A vulnerability, which was classified as problematic, was found in Backdrop CMS up to 1.13.4/1.14.1 (Content Management System). Affected is an unknown functionality of the component Block Description Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

An issue was discovered in Backdrop CMS 1.13.x before 1.13.5 and 1.14.x before 1.14.2. It doesn't sufficiently filter output when displaying certain block descriptions created by administrators. An attacker could potentially craft a specialized description, then have an administrator execute scripting when configuring a layout, aka XSS. This issue is mitigated by the fact that the attacker would be required to have the permission to create custom blocks, which is typically an administrative task.

The weakness was published 12/19/2019. This vulnerability is traded as CVE-2019-19901 since 12/19/2019. It is possible to launch the attack remotely. The successful exploitation needs a authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 1.13.5 or 1.14.2 eliminates this vulnerability.

Productinfo

Type

• Content Management System

Vendor

• Backdrop

Name

• CMS

Version

• 1.13.0
• 1.13.1
• 1.13.2
• 1.13.3
• 1.13.4
• 1.14.0
• 1.14.1

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CPE 2.2info

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