CVE-2024-7628Network attack vector

Account takeover via loose Firebase token comparison

Published Aug 15, 2024 · Updated Apr 8, 2026

Authentication bypass in FluxBuilder MStore API 4.15.2 and earlier allows remote attackers to access an existing WordPress account. The verify_id_token function uses loose comparison when validating a Firebase identity token, allowing a matching email address or phone number to satisfy the check incorrectly. Exploitation requires site-level Firebase configuration, access to an @flutter.io identity, and Firebase enrollment on the targeted account; an administrator account yields site takeover.

CVSS severity8.1
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in FluxBuilder MStore API 4.15.2 and earlier allows remote attackers to access an existing WordPress account. The verify_id_token function uses loose comparison when validating a Firebase identity token, allowing a matching email address or phone number to satisfy the check incorrectly. Exploitation requires site-level Firebase configuration, access to an @flutter.io identity, and Firebase enrollment on the targeted account; an administrator account yields site takeover.

The record

CVE
CVE-2024-7628
Published
Aug 15, 2024
Updated
Apr 8, 2026
Vendor
FluxBuilder
Product
MStore API
Classifications
CWE-306, CWE-288, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FluxBuilder · MStore APIversion=0 <=4.15.2

Published CVSS scores

8.1WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-288Authentication Bypass Using an Alternate Path or Channel
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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