What is CVE-2026-90437?

CVE-2026-90437 is a high-severity vulnerability in Gravity Forms, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-30.

How severe is CVE-2026-90437?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Gravity Forms

CVE-2026-90437

The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Excerpt / Post Custom Field / Rich-Text Paragraph Field Values in all versions up to, and including, 3.1.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because Post Excerpt, Post Custom Field, and Rich-Text-Editor-enabled Paragraph Text fields allow raw HTML submissions via allow_html(), and an entity-encoded payload stored in a data-dialog-confirm attribute evades wp_kses_post() at save time but is decoded into executable markup by the browser when the plugin's admin JavaScript passes the attribute value to insertAdjacentHTML().

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-30 · last modified 2026-10-30.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (8.7th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Gravity Forms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-90437?: CVE-2026-90437 is a high-severity vulnerability in Gravity Forms, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-30.
How severe is CVE-2026-90437?: High severity. CVSS v3 base score is 7.2 out of 10.