Vulnerability identifier: #VU73275

Vulnerability risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23913

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ActionView
Server applications / Frameworks for developing and running applications

Vendor: Rails

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 rails-ujs, which leverages the Clipboard API to target HTML elements that are assigned the contenteditable attribute. 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 updates from vendor's website.

Vulnerable software versions

ActionView: 5.1.0 - 7.0.4.2

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External links
http://discuss.rubyonrails.org/t/cve-2023-23913-dom-based-cross-site-scripting-in-rails-ujs-for-contenteditable-html-elements/82468
http://github.com/rails/rails/releases/tag/v7.0.4.3
http://github.com/rails/rails/releases/tag/v6.1.7.3

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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.