CVE-2022-23519

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Prior to version 1.4.4, a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer's allowed tags in either of the following ways: allow both "math" and "style" elements, or allow both "svg" and "style" elements. Code is only impacted if allowed tags are being overridden. . This issue is fixed in version 1.4.4. All users overriding the allowed tags to include "math" or "svg" and "style" should either upgrade or use the following workaround immediately: Remove "style" from the overridden allowed tags, or remove "math" and "svg" from the overridden allowed tags.

How to fix CVE-2022-23519

To remediate CVE-2022-23519, upgrade the affected package to a fixed version below.

• —upgrade to 1.3.0-1+deb11u1 or later
• —upgrade to 1.4.4 or later

Is CVE-2022-23519 being exploited?

Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 1.3.0-1+deb11u1
• from 0, < 1.4.4

CVSS scores

References (8)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-23519
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-23519
• PATCHgithub.com/rails/rails-html-sanitizer
• WEBgithub.com/rails/rails-html-sanitizer/security/advisories/GHSA-9h9g-93gc-623h