CVE-2023-44390

HtmlSanitizer vulnerable to Cross-site Scripting in Foreign Content

Description

HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. The vulnerability occurs in configurations where foreign content is allowed, i.e. either `svg` or `math` are in the list of allowed elements. In the 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. The vulnerability has been fixed in versions 8.0.723 and 8.1.722-beta (preview version).

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.21%
Vendor Advisory github.com
Affected: mganss HtmlSanitizer
Published at:
Updated at:

References

Link Tags
https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-43cp-6p3q-2pc4 vendor advisory
https://github.com/mganss/HtmlSanitizer/commit/ab29319866c020f0cc11e6b92228cd8039196c6e patch

Frequently Asked Questions

What is the severity of CVE-2023-44390?
CVE-2023-44390 has been scored as a medium severity vulnerability.
How to fix CVE-2023-44390?
To fix CVE-2023-44390, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-44390 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-44390 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-44390?
CVE-2023-44390 affects mganss HtmlSanitizer.
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