Vulnerability-Lookup

CVE-2026-8787 (GCVE-0-2026-8787)

Vulnerability from cvelistv5 – Published: 2026-05-27 05:31 – Updated: 2026-05-27 10:34

Title

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

Summary

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.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 10:21 UTC

CWE

CWE-269 - Improper Privilege Management

Assigner

Wordfence mitre root

References

5 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/admin-…
https://plugins.trac.wordpress.org/browser/admin-…
https://plugins.trac.wordpress.org/browser/admin-…
https://plugins.trac.wordpress.org/browser/admin-…

Impacted products

1 product

Vendor	Product	Version	CPE status
devsabbirahmed	Firebase Support & Chat Management	Affected: <= 3.1.1	guessed

Credits

Farrukh Ziyaev

Show details on NVD website

JSON

To clipboard

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CNVD-2026-25465

Vulnerability from cnvd - Published: 2026-06-26

Title

WordPress插件Firebase Support and Chat Management存在未明漏洞

Description

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插件Firebase Support and Chat Management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，攻击者可利用该漏洞通过提交任意用户邮箱登录，导致账户接管。

Severity

高

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://wordpress.org/plugins/firebase-support-and-chat-management/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-8787

Impacted products

Name
WordPress Firebase Support and Chat Management plugin <=3.1.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-8787",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-8787"
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  "description": "\u8be5\u5e73\u53f0\u5177\u6709\u5728\u57fa\u4e8ePHP\u548cMySQL\u7684\u670d\u52a1\u5668\u4e0a\u67b6\u8bbe\u4e2a\u4eba\u535a\u5ba2\u7f51\u7ad9\u7684\u529f\u80fd\u3002WordPress plugin\u662f\u4e00\u4e2a\u5e94\u7528\u63d2\u4ef6\u3002\n\nWordPress\u63d2\u4ef6Firebase Support and Chat Management\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8efirebase_auth\u51fd\u6570\u672a\u9a8c\u8bc1\u7528\u6237\u90ae\u7bb1\u6240\u6709\u6743\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u63d0\u4ea4\u4efb\u610f\u7528\u6237\u90ae\u7bb1\u767b\u5f55\uff0c\u5bfc\u81f4\u8d26\u6237\u63a5\u7ba1\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-25465",
  "openTime": "2026-06-26",
  "products": {
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  "serverity": "\u9ad8",
  "submitTime": "2026-05-29",
  "title": "WordPress\u63d2\u4ef6Firebase Support and Chat Management\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

FKIE_CVE-2026-8787

Vulnerability from fkie_nvd - Published: 2026-05-27 07:16 - Updated: 2026-06-17 11:04

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L237
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L338
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L237
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L338
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/90783d75-a255-4133-ac7b-32e0a70c8c69?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "product": "Firebase Support \u0026 Chat Management",
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        "type": "Secondary"
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    },
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}

GHSA-G86W-5353-83R2

Vulnerability from github – Published: 2026-05-27 09:31 – Updated: 2026-05-27 09:31

Details

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.

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-8787"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T07:16:15Z",
    "severity": "HIGH"
  },
  "details": "The Firebase Support \u0026 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 \u2014 including an Administrator \u2014 by submitting that user\u0027s email address to the `acb_firebase_auth` AJAX action, resulting in full account takeover.",
  "id": "GHSA-g86w-5353-83r2",
  "modified": "2026-05-27T09:31:13Z",
  "published": "2026-05-27T09:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8787"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L237"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L338"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L237"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L338"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/90783d75-a255-4133-ac7b-32e0a70c8c69?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-8787 (GCVE-0-2026-8787)

CNVD-2026-25465

FKIE_CVE-2026-8787

GHSA-G86W-5353-83R2

Tags

Sightings

Nomenclature

Related by attack behaviour