# CVE-2026-49768: Happyforms PHP Object Injection in WordPress plugin

Source: https://junglewise.ai/threats/cve-2026-49768-happyforms-php-object-injection-in-wordpress-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-49768 · Severity: critical · CVSS 9.8 · Published 2026-06-15

Happyforms is a popular WordPress plugin used to create and manage contact forms. A critical security flaw allows unauthorized individuals to inject malicious code into the website without needing a login. This could lead to a complete takeover of the site, theft of sensitive customer data, or a total service outage.

Technologies: [Happyforms](https://junglewise.ai/threats/technologies/happyforms). Vendors: [Happyforms](https://junglewise.ai/threats/vendors/happyforms).

## Quick answers

**Is CVE-2026-49768 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49768 being exploited in the wild.

**How severe is CVE-2026-49768?** Critical severity, with a CVSS score of 9.8, published 15 June 2026.

**Which products and versions are affected?** Happyforms <= 1.26.13.

**Is there a fix for CVE-2026-49768?** 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-2026-49768 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-49768?** Check whether you run Happyforms 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 Happyforms plugin for WordPress due to improper handling of untrusted data during deserialization (CWE-502). 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 can achieve remote code execution, perform SQL injection, or access sensitive files via path traversal. The vulnerability is resolved in version 1.26.14.

## Affected products

- Happyforms Happyforms <= 1.26.13

## Timeline

- 2026-05-20: other: Reported by researcher longnv719
- 2026-06-04: advisory: Patchstack published advisory and mitigation rules
- 2026-06-15: disclosed: CVE published to NVD

## References

- [https://patchstack.com/database/wordpress/plugin/happyforms/vulnerability/wordpress-happyforms-plugin-1-26-13-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/happyforms/vulnerability/wordpress-happyforms-plugin-1-26-13-php-object-injection-vulnerability?_s_id=cve)

## Related threats

- [Happyforms plugin stored XSS via spoofable client IP headers](https://junglewise.ai/threats/cve-2026-93755-the-happyforms-plugin-for-wordpress-is-vulnerable-to-stored-cross)
- [HappyForms WordPress plugin HTML injection in notification email](https://junglewise.ai/threats/cve-2026-14556-the-happyforms-wordpress-plugin-before-1-26-15-does-not-sanitise)
- [WordPress Happyforms plugin unauthenticated cross-site scripting](https://junglewise.ai/threats/cve-2026-97065-unauthenticated-cross-site-scripting-xss-in-happyforms-1-26-15)
- [Happyforms WordPress plugin Local File Inclusion in happyforms_get_form_partial](https://junglewise.ai/threats/cve-2025-11977-happyforms-wordpress-plugin-local-file-inclusion-in-happyforms)