CVE-2026-18548— Groundhogg <= 4.5.14 - Unauthenticated Stored Cross-Site Scripting via 'ref' Parameter
Quick assessment
Affected
trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation
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 插件 Groundhogg——一款集客户关系管理（CRM）、新闻邮件和营销自动化功能于一体的插件，在其所有不超过 4.5.14 的版本中存在存储型跨站脚本漏洞（Stored Cross-Site Scripting, XSS）。该漏洞源于对 'ref' 参数缺乏足够的输入过滤和输出转义。攻击者无需身份验证即可在页面中注入任意 Web 脚本，当其他用户访问被注入的页面时，这些脚本将会执行。
Possible ATT&CK Techniques 1 AI
T1059.001 · PowerShellAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| trainingbusinesspros | Groundhogg — CRM, Newsletters, and Marketing Automation | ≤ 4.5.14 |
affected |
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I. Basic Information for CVE-2026-18548
Vulnerability Information
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Vulnerability Title
Groundhogg <= 4.5.14 - Unauthenticated Stored Cross-Site Scripting via 'ref' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ref' parameter in all versions up to, and including, 4.5.14 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.
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 |
|---|---|---|---|---|
| trainingbusinesspros | Groundhogg — CRM, Newsletters, and Marketing Automation | 0 ~ 4.5.14 | - |
|
II. Public POCs for CVE-2026-18548
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-18548 (1)
Other References for CVE-2026-18548 (1)
IV. Related Vulnerabilities
Same product: Groundhogg — CRM, Newsletters, and Marketing Automation
-
CVE-2026-92975
Groundhogg <= 4.8.3 - Unauthenticated Privilege Escalation t -
CVE-2026-104725
Groundhogg <= 4.9 - Authenticated (Custom+) Privilege Escala -
CVE-2026-97644
Groundhogg <= 4.9 - Authenticated (Sales Person+) Privilege -
CVE-2026-81741
Groundhogg < 4.7.2 - Open Redirect via 'redirect_to' Paramet -
CVE-2026-81660
Groundhogg < 4.5.13 - Unauthenticated Stored XSS via Web For
Same vendor: trainingbusinesspros
-
CVE-2026-92975
Groundhogg <= 4.8.3 - Unauthenticated Privilege Escalation t -
CVE-2026-104725
Groundhogg <= 4.9 - Authenticated (Custom+) Privilege Escala -
CVE-2026-97644
Groundhogg <= 4.9 - Authenticated (Sales Person+) Privilege -
CVE-2026-18387
Groundhogg <= 4.5.14 - Authenticated (Vendor+) SQL Injection -
CVE-2026-11454
Groundhogg — CRM, Newsletters, and Marketing Automation <= 4
Same weakness: CWE-79
-
CVE-2026-111284
Aureus ERP through 1.6.0 Stored XSS via Time Off Holiday Act -
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Aureus ERP through 1.6.0 Stored XSS via Inventory Rule Actio -
CVE-2026-111233
Netgate pfSense CE 2.7.1 through 2.9.0 Reflected XSS via fir -
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Netgate pfSense CE 2.3.0 through 2.9.0 Stored XSS via Separa
V. Comments for CVE-2026-18548
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