CVE-2023-43643 mXSS in AntiSamy

2023-10-0913:31:46

CWE-79

GitHub_M

www.cve.org

antisamy

mxss

html parsing

vulnerability

patch

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

6.4 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

12.7%

JSON

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.

CNA Affected

[
  {
    "vendor": "nahsra",
    "product": "antisamy",
    "versions": [
      {
        "version": "<= 1.7.3",
        "status": "affected"
      }
    ]
  }
]