CVE-2026-91153: Information Disclosure (CVSS 5.3)

Description

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.6.2 via the process. This makes it possible for unauthenticated attackers to extract arbitrary WordPress post meta values — including license keys, API tokens, SMTP credentials, and Stripe or AWS secrets stored on any post type — via form submission notification emails or stored entries. The submission nonce is publicly rendered in every embedded form and can additionally be minted anonymously via the nopriv everest_forms_get_form_update_nonce action, meaning no account or prior authentication of any kind is required to complete the exploit.

Is your site exposed to CVE-2026-91153?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0061

Probability of exploitation

0.49%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-200 CWE-200

References

Other References

https://github.com/themegrill/everest-forms/pull/1669/changes https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/class-evf-ajax.php#L2342 https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/class-evf-ajax.php#L681 https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/class-evf-form-task.php#L261 https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/class-evf-form-task.php#L731 https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/class-evf-smart-tags.php#L503 https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/shortcodes/class-evf-shortcode-form.php#L370 https://plugins.trac.wordpress.org/changeset/3747723/everest-forms/trunk/includes/class-evf-form-task.php https://www.wordfence.com/threat-intel/vulnerabilities/id/b820a342-3aaa-4782-9d82-afe53028b72c?source=cve

Frequently Asked Questions

What is CVE-2026-91153? +

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.6.2 via the process. This makes it possible for unauthenticated attackers to extract arbitrary WordPress post meta values — including license keys, API tokens, SMTP credentials, and Stripe or AWS secrets stored on any post type — via form submission notification emails or stored entries. The submission nonce is publicly rendered in every embedded form and can additionally be minted anonymously via the nopriv everest_forms_get_form_update_nonce action, meaning no account or prior authentication of any kind is required to complete the exploit. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-91153? +

CVE-2026-91153 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0061, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-91153? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-15625

Unauthenticated user is able to execute arbitrary SQL commands in Sparx Pro Cloud Server database in certain cases.

CVE-2026-22051

StorageGRID (formerly StorageGRID Webscale) versions prior to 11.9.0.13 and 12.0.0.6 are susceptible to a Information Disclosure vulnerability. Successful exploit could …

CVE-2026-41186

When Calico's shared debug server is enabled (disabled by default), the Calico kube-controllers and Goldmane components bind their Go pprof …

CVE-2026-54396

An information disclosure vulnerability exists in the MISP AuthKey edit functionality. When a validation error occurs during an AuthKey edit …

CVE-2026-13230

An information disclosure vulnerability was identified in TP-Link Kasa EC70 v4 and EC71 v4 in the local discovery mechanism, which …

CVE-2026-53912

Cerebrate before version 1.37 exposed credential material from self-registration requests. The self-registration workflow stored the registrant’s hashed password in the …

CVE-2026-91153