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

Quick assessment

Affected

Gravity Forms Gravity Forms

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Gravity Forms 插件在所有 3.1.1 及以下版本中，由于输入清理（sanitization）和输出转义（escaping）不足，存在存储型跨站脚本（Stored XSS）漏洞。该漏洞可通过文章摘要（Post Excerpt）、文章自定义字段（Post Custom Field）或启用富文本编辑器的段落字段（Rich-Text Paragraph Field）的值触发。这使得未认证的攻击者能够在页面上注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将被执行。漏洞产生的

CVSS 7.2 · High Updated Oct 30, 2026

Possible ATT&CK Techniques 1 AI

T1193

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Gravity Forms <= 3.1.1 - Unauthenticated Stored Cross-Site Scripting via Post Excerpt / Post Custom Field / Rich-Text Paragraph Field Values

Source: CVE Program / CVE List V5

Vulnerability 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().

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Gravity Forms	Gravity Forms	0 ~ 3.1.1	-

II. Public POCs for CVE-2026-90437

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-90437

请登录查看更多情报信息。

Other References for CVE-2026-90437 (2)

https://www.cve.org/CVERecord?id=CVE-2026-90437

Same Patch Batch · Gravity Forms · 2026-10-30 · 3 CVEs total

CVE-2026-103039	9.8 CRITICAL	Gravity Forms <= 3.1.2 - Unauthenticated PHP Object Injection via Post Custom Field
CVE-2026-97645	7.2 HIGH	Gravity Forms <= 3.1.2 - Unauthenticated Stored Cross-Site Scripting via List Field

IV. Related Vulnerabilities

Same product: Gravity Forms

Same vendor: Gravity Forms

Same weakness: CWE-79