Vulnerability identifier: #VU75787

Vulnerability risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-23518

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
rails-html-sanitizer
Universal components / Libraries / Programming Languages & Components

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 passed via URLs when used in combination with Loofah. 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

rails-html-sanitizer: 1.3.0 - 1.4.3

---

External links
http://hackerone.com/reports/1694173
http://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-mcvf-2q2m-x72m
http://github.com/rails/rails-html-sanitizer/issues/135

---

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.