Stored XSS in Nodequeue component for Backdrop CMS

1) Stored cross-site scripting

EUVDB-ID: #VU23429

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

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

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied JSON data. A remote authenticated user with "manipulate queues" privileges can inject specially crafted data and execute arbitrary HTML and script code on a page where nodequeue.js is loaded.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nodequeue: 1.x-2.1.0 - 1.x-2.1.7

External links

http://backdropcms.org/security/backdrop-sa-contrib-2019-013

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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