CVE-2020-26293
Medium
Description
HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. In HtmlSanitizer before version 5.0.372, there is a possible XSS bypass if style tag is allowed. If you have explicitly allowed the `<style>` tag, an attacker could craft HTML that includes script after passing through the sanitizer. The default settings disallow the `<style>` tag so there is no risk if you have not explicitly allowed the `<style>` tag. The problem has been fixed in version 5.0.372.
SeverityMedium
CVSS6.1
Exploit probability—
ProductHtmlsanitizer
PublishedJan 4, 2021
First seenJan 4, 2021
Weakness typeCWE-74Injection
How to fix
Update
- htmlsanitizer_project htmlsanitizer5.0.372 or later
- HtmlSanitizer5.0.372 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| htmlsanitizer_project htmlsanitizer | v < 5.0.372 | 5.0.372 |
| HtmlSanitizerNuGet | v < 5.0.372 | 5.0.372 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.