Possible XSS bypass if style tag is allowed
Published Jan 4, 2021
6.1
LOWCVSS 3.1
EPSS 1.01%
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.
Affected products
-
- Version < 5.0.372StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mganss | HtmlSanitizer | n/a |
|
- < 5.0.372
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (6)
- https://github.com/advisories/GHSA-8j9v-h2vp-2hhv Advisory
- https://github.com/mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a49e9c7e2eb8 x_refsource_MISCPatchThird Party Advisory
- https://github.com/mganss/HtmlSanitizer/releases/tag/v5.0.372 x_refsource_MISCRelease NotesThird Party Advisory
- https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-26293
- https://www.nuget.org/packages/HtmlSanitizer/ x_refsource_MISCProductThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-8j9v-h2vp-2hhv | Advisory | |
| https://github.com/mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a49e9c7e2eb8 | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/mganss/HtmlSanitizer/releases/tag/v5.0.372 | x_refsource_MISCRelease NotesThird Party Advisory | |
| https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv | x_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-26293 | ||
| https://www.nuget.org/packages/HtmlSanitizer/ | x_refsource_MISCProductThird Party Advisory |
Change history (0)
No recorded changes yet.