Unauthenticated account takeover via unverified phone parameter
Published Jul 12, 2024 · Updated Apr 8, 2026
Authentication bypass in FluxBuilder MStore API 4.14.7 and earlier allows remote attackers to take over accounts through SMS login. The firebase_sms_login and firebase_sms_login_v2 functions insufficiently verify the phone parameter before authenticating a matching account or creating a default-role account. No credentials are required, but takeover requires an existing user's email address or phone number; a new address bypasses disabled registration.
Summary
What happened
Authentication bypass in FluxBuilder MStore API 4.14.7 and earlier allows remote attackers to take over accounts through SMS login. The firebase_sms_login and firebase_sms_login_v2 functions insufficiently verify the phone parameter before authenticating a matching account or creating a default-role account. No credentials are required, but takeover requires an existing user's email address or phone number; a new address bypasses disabled registration.
The record
- CVE
- CVE-2024-6328
- Published
- Jul 12, 2024
- Updated
- Apr 8, 2026
- Vendor
- FluxBuilder
- Product
- MStore API
- Classifications
- CWE-288, CWE-862, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 12, 2024CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=0 <=4.14.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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