# CVE-2026-40754: Elated-Themes Roisin PHP Object Injection

Source: https://junglewise.ai/threats/cve-2026-40754-elated-themes-roisin-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-2026-40754 · Severity: high · CVSS 8.1 · Published 2026-06-17

The Roisin theme for WordPress is vulnerable to a security flaw that allows unauthorized users to inject malicious code into a website. This could lead to a total takeover of the site, theft of customer data, or a complete service outage. Website owners using this theme should update to version 1.5 immediately to protect their operations and reputation.

Vendors: [Elated-Themes](https://junglewise.ai/threats/vendors/elated-themes).

## Quick answers

**Is CVE-2026-40754 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40754 being exploited in the wild.

**How severe is CVE-2026-40754?** High severity, with a CVSS score of 8.1, published 17 June 2026.

**Which products and versions are affected?** Elated-Themes Roisin <= 1.4.

**Is there a fix for CVE-2026-40754?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-40754 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-40754?** Check whether you run Elated-Themes Roisin 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 Roisin theme for WordPress in versions up to and including 1.4. The flaw stems from the deserialization of untrusted data (CWE-502) without proper validation. An unauthenticated remote attacker can exploit this by sending specially crafted input to the application. If a suitable Property-Oriented Programming (POP) chain is present on the server, the attacker could achieve remote code execution, perform SQL injection, or access sensitive files. The vulnerability is addressed in version 1.5.

## Affected products

- Elated-Themes Roisin <= 1.4

## Timeline

- 2026-02-24: other: Reported by Denver Jackson
- 2026-04-20: disclosed: Initial disclosure by Patchstack
- 2026-06-17: advisory: NVD publication date

## References

- [https://wordpress.org/themes](https://wordpress.org/themes)
- [https://patchstack.com/database/wordpress/theme/roisin/vulnerability/wordpress-roisin-theme-1-4-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/theme/roisin/vulnerability/wordpress-roisin-theme-1-4-php-object-injection-vulnerability?_s_id=cve)