HtmlSanitizer vulnerable to Cross-site Scripting in Foreign Content
CVE-2023-44390

6.1MEDIUM

Key Information:

Vendor

Mganss

Status
Htmlsanitizer
Vendor
CVE Published:
5 October 2023

What is CVE-2023-44390?

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).

Affected Version(s)

HtmlSanitizer < 8.0.723 < 8.0.723

HtmlSanitizer >= 8.1.0-beta, < 8.1.722-beta < 8.1.0-beta, 8.1.722-beta

References

https://github.com/mganss/HtmlSanitizer/security/advisori...
x_refsource_CONFIRM
https://github.com/mganss/HtmlSanitizer/commit/ab29319866...
x_refsource_MISC

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.