Is CVE-2022-23499 actively exploited?

No active exploitation of CVE-2022-23499 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-23499 be exploited remotely?

Yes. CVE-2022-23499 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-23499?

CVE-2022-23499 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2022-23499

MEDIUM

CVE-2022-23499

CWE-79Published: December 13, 2022· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

HTML sanitizer is written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. In versions prior to 1.5.0 or 2.1.1, malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized due to a parsing issue in the upstream package masterminds/html5. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer. The upstream package masterminds/html5 provides HTML raw text elements (`script`, `style`, `noframes`, `noembed` and `iframe`) as DOMText nodes, which were not processed and sanitized further. None of the mentioned elements were defined in the default builder configuration, that's why only custom behaviors, using one of those tag names, were vulnerable to cross-site scripting. This issue has been fixed in versions 1.5.0 and 2.1.1.

NVD Source

Technical Analysis

CVE-2022-23499 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.