# CVE-2026-39529: ThemeREX Group Elementra PHP object injection

Source: https://junglewise.ai/threats/cve-2026-39529-themerex-group-elementra-php-object-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-17. Updated: 2026-06-17  
License: CC BY 4.0 with a link back

CVE-2026-39529 · Severity: critical · CVSS 9.8 · Published 2026-06-17

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.

Vendors: [ThemeREX](https://junglewise.ai/threats/vendors/themerex).

## Quick answers

**Is CVE-2026-39529 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39529 being exploited in the wild.

**How severe is CVE-2026-39529?** Critical severity, with a CVSS score of 9.8, published 17 June 2026.

**Which products and versions are affected?** ThemeREX Elementra <= 1.0.9.

**Is there a fix for CVE-2026-39529?** A patch was published on 2026-04-20: Version 1.1.0 released to address the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39529 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-39529?** Check whether you run ThemeREX Elementra at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## 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

## References

- [https://wordpress.org/themes](https://wordpress.org/themes)
- [https://patchstack.com/database/wordpress/theme/elementra/vulnerability/wordpress-elementra-theme-1-0-9-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/theme/elementra/vulnerability/wordpress-elementra-theme-1-0-9-php-object-injection-vulnerability?_s_id=cve)