Is CVE-2024-43407 actively exploited?

No active exploitation of CVE-2024-43407 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-43407 be exploited remotely?

Yes. CVE-2024-43407 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-43407?

CVE-2024-43407 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2024-43407

CWE-79Published: August 21, 2024· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A potential vulnerability has been discovered in CKEditor 4 Code Snippet GeSHi plugin. The vulnerability allowed a reflected XSS attack by exploiting a flaw in the GeSHi syntax highlighter library hosted by the victim. The GeSHi library was included as a vendor dependency in CKEditor 4 source files. In a specific scenario, an attacker could craft a malicious script that could be executed by sending a request to the GeSHi library hosted on a PHP web server. The GeSHi library is no longer actively maintained. Due to the lack of ongoing support and updates, potential security vulnerabilities have been identified with its continued use. To mitigate these risks and enhance the overall security of the CKEditor 4, we have decided to completely remove the GeSHi library as a dependency. This change aims to maintain a secure environment and reduce the risk of any security incidents related to outdated or unsupported software. The fix is be available in version 4.25.0-lts.

NVD Source

Technical Analysis

CVE-2024-43407 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.