#VU30512 Cross-site scripting in Backdrop CMS - CVE-2019-19903

Vulnerability identifier: #VU30512

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-19903

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Backdrop CMS
Web applications / CMS

Vendor: Backdrop CMS

Description

The vulnerability allows a remote privileged user to read and manipulate data.

An issue was discovered in Backdrop CMS 1.14.x before 1.14.2. It doesn't sufficiently filter output when displaying file type descriptions created by administrators. An attacker could potentially craft a specialized description, then have an administrator execute scripting when viewing the list of file types, aka XSS. This vulnerability is mitigated by the fact that an attacker must have a role with the "Administer file types" permission.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Backdrop CMS: 1.14.0 - 1.14.1

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External links
https://backdropcms.org/security/backdrop-sa-core-2019-015

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.