CVE-2020-26293

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Summary

CVECVE-2020-26293
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-01-04 19:15:00 UTC
Updated2021-01-07 20:29:00 UTC
DescriptionHtmlSanitizer 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.

Risk And Classification

Problem Types: CWE-79

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Htmlsanitizer Project Htmlsanitizer All All All All
Application Htmlsanitizer Project Htmlsanitizer All All All All

References

ReferenceSourceLinkTags
Release 5.0.372 · mganss/HtmlSanitizer · GitHub MISC github.com Release Notes, Third Party Advisory
Possible XSS bypass if style tag is allowed · Advisory · mganss/HtmlSanitizer · GitHub CONFIRM github.com Third Party Advisory
NuGet Gallery | HtmlSanitizer 2.0.5449.20550 MISC www.nuget.org Product, Third Party Advisory
Fix hex escape issue in style element · mganss/HtmlSanitizer@a3a7602 · GitHub MISC github.com Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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