Stored cross-site scripting in Starter Templates — Elementor, Gutenberg & Beaver Builder Templates plugin for WordPress

1) Stored cross-site scripting

EUVDB-ID: #VU58277

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: CVE-2021-42360

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 data in the "astra-page-elementor-batch-process" AJAX action. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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

Astra Starter Sites – Elementor, Beaver Builder & Gutenberg Templates: 1.0.0 - 2.7.0

CPE2.3

• cpe:2.3:a:brainstormforce:astra-sites:1.0.0:*:*:*:*:*:*:
• cpe:2.3:a:brainstormforce:astra-sites:1.0.1:*:*:*:*:*:*:
• cpe:2.3:a:brainstormforce:astra-sites:1.0.2:*:*:*:*:*:*:

External links

http://www.wordfence.com/blog/2021/11/over-1-million-sites-impacted-by-vulnerability-in-starter-templates-plugin/

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.