CVE-2023-44390 – htmlsanitizer

Package

Manager: nuget
Name: htmlsanitizer
Vulnerable Version: >=0 <8.0.723 || >=8.1.0-beta <8.1.722-beta

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

EPSS: 0.00161 pctl0.37529

Details

HtmlSanitizer vulnerable to Cross-site Scripting in Foreign Content ### 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.

Metadata

Created: 2023-10-04T18:52:35Z
Modified: 2023-10-05T19:39:51Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-43cp-6p3q-2pc4/GHSA-43cp-6p3q-2pc4.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-43cp-6p3q-2pc4
Finding: F008
Auto approve: 1