CVE 8.8 HIGH

Firebase Support & Chat Management <= 3.1.1 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation_CVE-2026-8787

May 27, 2026 invoker category_cve

8.8 / 10

HIGH

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

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.

AI Analysis

Privilege escalation vulnerability due to missing authorization in the Firebase Support & Chat Management plugin for WordPress, allowing authenticated attackers to log in as an arbitrary existing user, including an Administrator.

Basic Information

ID CVE-2026-8787

Source Wordfence

Published May 27, 2026 at 05:31

Affected Product

Vendor devsabbirahmed

Product Firebase Support & Chat Management

Version <= 3.1.1

Affected Versions devsabbirahmed Firebase Support & Chat Management <= 3.1.1

CWE Classification

CWE-269

AI Assessment

AI Score 8.8 / 10

AI Severity High

Vendor devsabbirahmed

Product Firebase Support & Chat Management

Version <= 3.1.1

References

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    "published": "2026-05-27T05:31:28.027Z",
    "modified": "2026-05-27T05:31:28.027Z",
    "type": "cve",
    "title": "Firebase Support & Chat Management <= 3.1.1 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/90783d75-a255-4133-ac7b-32e0a70c8c69?source=cve\nhttps://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L237\nhttps://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L237\nhttps://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L338\nhttps://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L338",
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    "ai_severity": "High",
    "ai_vendor": "devsabbirahmed",
    "ai_product": "Firebase Support & Chat Management",
    "ai_version": "<= 3.1.1",
    "ai_score": 8.8
}

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