CVE-2023-43643 MEDIUM

CVE-2023-43643: mXSS in AntiSamy

Vendor Nahsra
Product antisamy
Weakness CWE-79 · XSS
Published October 9, 2023
Last update September 19, 2024

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

AntiSamy is a library for performing fast, configurable cleansing of HTML coming from untrusted sources. Prior to version 1.7.4, there is a potential for a mutation XSS (mXSS) vulnerability in AntiSamy caused by flawed parsing of the HTML being sanitized. To be subject to this vulnerability the `preserveComments` directive must be enabled in your policy file and also allow for certain tags at the same time. As a result, certain crafty inputs can result in elements in comment tags being interpreted as executable when using AntiSamy's sanitized output. This issue has been patched in AntiSamy 1.7.4 and later.

Key dates

02Disclosure timeline

October 9, 2023 CVE published
September 19, 2024 Record updated

Related vulnerabilities

04Related CVE