This vulnerability (CVE-2026-39467) in MetaSlider Responsive Slider involves CWE-502: Deserialization of Untrusted Data. It allows an attacker with high privileges to inject objects during deserialization, potentially leading to full compromise of the affected system. The CVSS v3.1 base score is 7.2, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The affected product versions include all versions up to 3.106.0. No patch or official remediation level has been disclosed by the vendor or in the advisory.

Successful exploitation could allow an attacker with high privileges to execute arbitrary code or manipulate application data via object injection, severely impacting confidentiality, integrity, and availability of the system running the vulnerable MetaSlider plugin. Since the attack requires high privileges, the risk is somewhat mitigated by the need for prior access. No known exploits in the wild have been reported to date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to high-privilege accounts and monitor for suspicious activity related to the MetaSlider plugin. Avoid using untrusted data inputs that could trigger deserialization. Do not rely on generic mitigations; await vendor updates.