Vulnerability identifier: #VU31888

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15118

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
wagtail
Web applications / CMS

Vendor: Torchbox

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 withnin the help text in the "wagtail.contrib.forms" form builder app. A remote authenticated attacker can trick the victim to follow a specially crafted link 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

wagtail: 2.7 - 2.9.2

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External links
http://docs.djangoproject.com/en/3.0/ref/models/fields/#django.db.models.Field.help_text
http://docs.wagtail.io/en/stable/reference/contrib/forms/index.html#usage
http://github.com/wagtail/wagtail/blob/master/docs/releases/2.9.3.rst
http://github.com/wagtail/wagtail/commit/d9a41e7f24d08c024acc9a3094940199df94db34
http://github.com/wagtail/wagtail/security/advisories/GHSA-2473-9hgq-j7xw

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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.