CVE-2026-27338 in Car Zone Plugin
Summary
by MITRE • 03/05/2026
Deserialization of Untrusted Data vulnerability in AivahThemes Car Zone carzone allows Object Injection.This issue affects Car Zone: from n/a through <= 3.7.
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Analysis
by VulDB Data Team • 03/11/2026
The CVE-2026-27338 vulnerability represents a critical deserialization flaw in the AivahThemes Car Zone WordPress theme, specifically impacting versions through 3.7. This vulnerability falls under the CWE-502 category, which classifies deserialization of untrusted data as a serious security weakness that can lead to arbitrary code execution. The issue stems from the theme's improper handling of serialized data structures, creating an attack surface where malicious actors can inject crafted objects that will be deserialized without adequate validation or sanitization. The vulnerability is particularly dangerous because it allows for object injection attacks that can be leveraged to execute arbitrary code on the target system.
The technical exploitation of this vulnerability occurs when the Car Zone theme processes user-supplied data that contains serialized objects without proper input validation. Attackers can craft malicious serialized data that, when processed by the vulnerable theme, gets deserialized and executed within the context of the web server. This typically involves manipulating parameters that are passed to functions within the theme's codebase where deserialization occurs. The vulnerability is particularly concerning because it operates at a fundamental level of data processing, allowing attackers to potentially execute arbitrary commands, escalate privileges, or even establish persistent backdoors on the compromised system.
The operational impact of CVE-2026-27338 extends beyond simple code execution, as it can lead to complete system compromise and data breach scenarios. An attacker who successfully exploits this vulnerability can gain full control over the WordPress installation, potentially accessing sensitive user data, modifying content, or using the compromised system as a launchpad for further attacks within the network. The vulnerability affects not just individual websites but can also impact multiple sites if the theme is widely used across different installations. This makes it particularly dangerous in environments where multiple WordPress sites share common infrastructure or where the theme is deployed across numerous client installations.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected versions, with the AivahThemes team releasing updates that properly validate and sanitize all serialized data inputs. Organizations should implement strict input validation mechanisms, employ secure deserialization practices, and consider implementing web application firewalls to detect and block malicious payloads. The vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as attackers can leverage the deserialization flaw to execute system commands through the web application interface. Additionally, implementing principle of least privilege for web application processes and conducting regular security audits of third-party themes and plugins can help prevent similar vulnerabilities from being exploited in the future.