Executive brief
The Elementra theme for WordPress is vulnerable to a critical security flaw that allows remote attackers to interfere with the site's internal operations. By sending specially crafted data, an attacker can potentially take full control of the website, steal sensitive data, or crash the service. This vulnerability can be exploited without any user interaction or login credentials, making it a high risk for automated attacks.
Technical details
A PHP Object Injection vulnerability exists in the Elementra theme for WordPress (versions <= 1.0.9) due to improper deserialization of user-supplied input (CWE-502). An unauthenticated remote attacker can exploit this by submitting malicious input that the application passes to a deserialization function. If a suitable Property-Oriented Programming (POP) chain is present within the environment, the attacker can achieve remote code execution, perform SQL injection, or conduct path traversal. The vulnerability is resolved in version 1.1.0.
Affected products
- ThemeREX Group Elementra <= 1.0.9
Timeline
- 2026-02-20: other: Reported by researcher Bonds
- 2026-04-20: advisory: Initial advisory published by Patchstack
- 2026-06-17: disclosed: CVE published to NVD
- 2026-04-20: patched: Version 1.1.0 released to address the vulnerability