CVE-2023-44390

Description

### Impact The vulnerability occurs in configurations where foreign content is allowed, i.e. either `svg` or `math` are in the list of allowed elements. Specifically, the requirements for the vulnerability are: 1. Allowing one foreign element: `svg`, or `math` 2. Comments or one raw text element: `iframe`, `noembed`, `xmp`, `title`, `noframes`, `style` or `noscript` Configurations that meet the above requirements plus the following are vulnerable to an additional vulnerability: - Any HTML integration element: `title`, `desc`, `mi`, `mo`, `mn`, `ms`, `mtext`, `annotation-xml`. In case an application sanitizes user input with a vulnerable configuration, an attacker could bypass the sanitization and inject arbitrary HTML, including JavaScript code. Note that in the default configuration the vulnerability is not present. ### Patches The vulnerability has been fixed in versions 8.0.723 and 8.1.722-beta (preview version). ### Workarounds Disallow foreign elements `svg` and `math`. This is the case in the default configuration, which is therefore not affected by the vulnerability.

How to fix CVE-2023-44390

To remediate CVE-2023-44390, upgrade the affected package to a fixed version below.

• —upgrade to 8.0.723 or later

Is CVE-2023-44390 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 8.0.723

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-44390
• PATCHgithub.com/mganss/HtmlSanitizer
• WEBgithub.com/mganss/HtmlSanitizer/commit/ab29319866c020f0cc11e6b92228cd8039196c6e
• WEBgithub.com/mganss/HtmlSanitizer/security/advisories/GHSA-43cp-6p3q-2pc4