CVE-2025-66287
Published: 04 December 2025
Description
Adversaries may exploit software vulnerabilities in client applications to execute code.
Security Summary
CVE-2025-66287 is a vulnerability in WebKitGTK that allows processing of malicious web content to trigger an unexpected process crash due to improper memory handling, mapped to CWE-120 (Buffer Copy without Checking Size of Input). Published on 2025-12-04, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high severity with significant potential impacts across confidentiality, integrity, and availability.
Remote attackers require no privileges and can exploit this over the network with low attack complexity, but it necessitates user interaction, such as visiting a malicious webpage or opening crafted content in an affected application. Exploitation leads to process crashes and, per the CVSS metrics, high-level compromise of confidentiality, integrity, and availability, potentially enabling broader system impacts depending on the context of WebKitGTK usage.
Red Hat has issued multiple security advisories with patches addressing this vulnerability, including RHSA-2025:22789, RHSA-2025:22790, RHSA-2025:23110, RHSA-2025:23433, and RHSA-2025:23434, recommending affected users apply the updates promptly to mitigate risks.
Details
- CWE(s)
MITRE ATT&CK Enterprise Techniques
Why these techniques?
The vulnerability in WebKitGTK allows remote exploitation via malicious web content requiring user interaction, directly enabling Exploitation for Client Execution (T1203) through buffer overflow leading to process compromise.