CVE-2026-8787— Firebase Support & Chat Management <= 3.1.1 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation
Possible ATT&CK Techniques 1AI
T1136 · Create AccountAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| devsabbirahmed | Firebase Support & Chat Management | <= 3.1.1 | affected |
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I. Basic Information for CVE-2026-8787
Vulnerability Information
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Vulnerability Title
Firebase Support & Chat Management <= 3.1.1 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Firebase Support & Chat Management plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 3.1.1. This is due to the `firebase_auth()` function authenticating the request as the WordPress user whose email is supplied in the `user_email` POST parameter without verifying ownership of that email (no Firebase ID token signature/issuer/audience verification). This makes it possible for authenticated attackers, with Subscriber-level access and above, to log in as an arbitrary existing user — including an Administrator — by submitting that user's email address to the `acb_firebase_auth` AJAX action, resulting in full account takeover.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Firebase Support & Chat Management 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Firebase Support & Chat Management 3.1.1及之前版本存在安全漏洞，该漏洞源于firebase_auth函数未验证用户邮箱所有权，可能导致认证攻击者通过提交任意用户邮箱登录，导致账
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| devsabbirahmed | Firebase Support & Chat Management | <= 3.1.1 | - |
II. Public POCs for CVE-2026-8787
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-8787 (3)
Vendor Advisories for CVE-2026-8787 (1)
IV. Related Vulnerabilities
Same weakness: CWE-269
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Cisco Umbrella Virtual Appliance Privilege Escalation Vulner - CVE-2026-12165
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V. Comments for CVE-2026-8787
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