CVE-2026-16649— Gravity Forms <= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via Post Body Field Value
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 插件存在存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞，影响所有 ≤ 2.10.5 的版本。该漏洞源于输入净化和输出转义不足，使得未认证的攻击者能够在页面中注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将被执行。 具体机制如下： 利用在保存时能存活，是因为 允许必要的 HTML 标签和属性； 客户端的提示框（tooltip）脚本会将浏览器解码后的 值作为 重新解析，但仅会移除 元素，而像 等其他事件处理属性则完整
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-16649
Vulnerability Information
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Vulnerability Title
Gravity Forms <= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via Post Body Field Value
Source: CVE Program / CVE List V5
Vulnerability Description
The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Body Field Value in all versions up to, and including, 2.10.5 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. The exploit survives save-time sanitization because wp_kses_post allows the required HTML tags and attributes, and the client-side tooltip script re-parses the browser-decoded aria-label value as innerHTML while only stripping script elements, leaving onerror and other event-handler attributes fully intact and executable.
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 ~ 2.10.5 | - |
|
II. Public POCs for CVE-2026-16649
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-16649 (1)
IV. Related Vulnerabilities
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CVE-2026-19513
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CVE-2026-5110
Gravity Forms <= 2.10.0 - Unauthenticated Stored Cross-Site -
CVE-2026-5111
Gravity Forms <= 2.10.0 - Unauthenticated Stored Cross-Site
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Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Uplo -
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CVE-2026-5111
Gravity Forms <= 2.10.0 - Unauthenticated Stored Cross-Site -
CVE-2026-5109
Gravity Forms <= 2.10.0 - Unauthenticated Stored Cross-Site
Same weakness: CWE-79
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V. Comments for CVE-2026-16649
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