CVE-2023-43643 mXSS in AntiSamy

What is CVE-2023-43643?

CVE-2023-43643 is a medium-severity vulnerability in nahsra antisamy, published on 9 Oct 2023.

Official description

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.

Weakness: CWE-79

Which versions are affected by CVE-2023-43643?

2 open source packages ship an affected version, including org.owasp.antisamy:antisamy. It affects 1 product.

Products include Antisamy Project Antisamy.

How do I fix CVE-2023-43643?

Upgrade org.owasp.antisamy:antisamy to 1.7.4 or later.

Is CVE-2023-43643 being exploited?

There is no known exploitation of CVE-2023-43643 in the wild and no public exploit code.

Other vulnerabilities in nahsra antisamy

• CVE-2022-28366 Denial of service in HtmlUnit-Neko High 7.5
• CVE-2024-23635 AntiSamy malicious input can provoke XSS when preserving comments Medium 6.1
• CVE-2022-28367 Cross-site Scripting in OWASP AntiSamy Medium 6.1
• CVE-2022-29577 Cross-site Scripting in OWASP AntiSamy Medium 6.1
• CVE-2021-35043 Cross-site Scripting in OWASP AntiSamy Medium 6.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2023-43643, GHSA-pcf2-gh6g-h5r2, UBUNTU-CVE-2023-43643.