Unauthenticated account takeover via unchecked user ID
Published May 25, 2023 · Updated Apr 8, 2026
Authentication bypass in FluxBuilder MStore API 3.9.2 and earlier allows remote attackers to impersonate any WordPress user. The add-listing REST API handler accepts an attacker-supplied user ID and establishes an authenticated session without verifying control of that account. No credentials or user interaction are required, but the attacker must know an existing user ID; selecting an administrator yields administrator access.
Summary
What happened
Authentication bypass in FluxBuilder MStore API 3.9.2 and earlier allows remote attackers to impersonate any WordPress user. The add-listing REST API handler accepts an attacker-supplied user ID and establishes an authenticated session without verifying control of that account. No credentials or user interaction are required, but the attacker must know an existing user ID; selecting an administrator yields administrator access.
The record
- CVE
- CVE-2023-2732
- Published
- May 25, 2023
- Updated
- Apr 8, 2026
- Vendor
- FluxBuilder
- Product
- MStore API
- Classifications
- CWE-288, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 25, 2023CVE 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 <=3.9.2
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Wordfence-observed attacks against MStore APIreported exploitation
Technologies
Your stack
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Your stack
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