# CVE-2026-62103: Everest Forms PHP Object Injection

Source: https://junglewise.ai/threats/cve-2026-62103-everest-forms-php-object-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-11. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-62103 · Severity: critical · CVSS 9.8 · Published 2026-09-11

Everest Forms is a popular WordPress plugin for creating contact and form submission pages. An unauthenticated attacker can exploit a PHP object injection flaw to execute arbitrary code on affected WordPress sites, leading to complete server compromise, data theft, and malware installation.

## Quick answers

**Is CVE-2026-62103 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-62103 being exploited in the wild.

**How severe is CVE-2026-62103?** Critical severity, with a CVSS score of 9.8, published 11 September 2026.

**Which products and versions are affected?** Everest Forms Everest Forms 3.6.0 and earlier.

**Is there a fix for CVE-2026-62103?** 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-2026-62103 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-62103?** Check whether anything you run is named in the advisory. 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 Everest Forms versions up to 3.6.0, exploitable without authentication. The vulnerability allows attackers to manipulate object serialization/deserialization to achieve remote code execution on the affected server. The attack requires only network access to the affected WordPress installation; no user interaction or valid credentials are needed. Successful exploitation enables an attacker to run arbitrary PHP code with the privileges of the web server process. The vulnerability was patched in version 3.6.1 released on September 11, 2026.

## Affected products

- Everest Forms Everest Forms 3.6.0 and earlier

## Timeline

- 2026-09-11: disclosed: Vulnerability disclosed and patched in version 3.6.1
- 2026-09-11: advisory: CVE-2026-62103 published
- 2026-08-30: other: Vulnerability initially reported to Patchstack by LueRader

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/everest-forms/vulnerability/wordpress-everest-forms-plugin-3-6-0-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/everest-forms/vulnerability/wordpress-everest-forms-plugin-3-6-0-php-object-injection-vulnerability?_s_id=cve)