#VU47916 Stored cross-site scripting in strapi


Published: 2020-10-22 | Updated: 2020-10-26

Vulnerability identifier: #VU47916

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27666

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
strapi
Web applications / CMS

Vendor: strapi.io

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 wysiwyg editor's preview feature. A remote 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 update from vendor's website.

Vulnerable software versions

strapi: 3.2.0 - 3.2.4


External links
http://github.com/strapi/strapi/pull/8440
http://github.com/strapi/strapi/releases/tag/v3.2.5


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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


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