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Mstore Api CVE-2021-24148

CRITICAL
Improper Authentication (CWE-287)
2021-03-18 contact@wpscan.com
9.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

A remote attacker could bypass authentication mechanisms to gain unauthorized access by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 3.4% exploitation probability (EPSS)

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AnalysisAI

A business logic issue in the MStore API WordPress plugin, versions before 3.2.0, had an authentication bypass with Sign In With Apple allowing unauthenticated users to recover an authentication. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. A business logic issue in the MStore API WordPress plugin, versions before 3.2.0, had an authentication bypass with Sign In With Apple allowing unauthenticated users to recover an authentication cookie with only an email address. Affected products include: Inspireui Mstore Api. Version information: before 3.2.0.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

A business logic issue in the MStore API WordPress plugin, versions before 3.2.0, had an authentication bypass with Sign In With Apple allowing unauthenticated users to recover an authentication cookie with only an email address.

Threat Intelligence Overview

EPSS Score
3.4%
Top 13% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 3.4%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

52
Low Medium High Critical
KEV: 0
EPSS: +3
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:inspireui:mstore_api:*:*:*:*:*:wordpress:*:*
CVE-2023-2732 CRITICAL POC
9.8 May 25

The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.9.2. Rate

CVE-2023-2734 CRITICAL POC
9.8 May 25

The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.9.1. Rate

CVE-2023-3277 CRITICAL POC
9.8 Nov 03

The MStore API plugin for WordPress is vulnerable to Unauthorized Account Access and Privilege Escalation in versions up

CVE-2023-3197 CRITICAL POC
9.8 Jun 24

The MStore API plugin for WordPress is vulnerable to Unauthenticated Blind SQL Injection via the 'id' parameter in versi

CVE-2020-36713 CRITICAL POC
9.8 Jun 07

The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.1.5. Rate

CVE-2023-3077 CRITICAL POC
9.8 Jul 10

The MStore API WordPress plugin before 3.9.8 does not sanitise and escape a parameter before using it in a SQL statement

CVE-2023-3076 CRITICAL POC
9.8 Jul 10

The MStore API WordPress plugin before 3.9.9 does not prevent visitors from creating user accounts with the role of thei

CVE-2021-47933 CRITICAL POC
9.3 May 10

WordPress MStore API 2.0.6 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to uplo

CVE-2026-16038 CRITICAL POC
9.1 Aug 07

Authentication bypass in the MStore API WordPress plugin before 4.21.0 lets an unauthenticated remote attacker mark any

CVE-2026-16030 HIGH POC
8.1 Aug 07

Account takeover in MStore API WordPress plugin before 4.21.0 is achievable by unauthenticated remote attackers who know

CVE-2026-16041 HIGH POC
7.5 Aug 07

Integrity bypass in MStore API WordPress plugin (versions before 4.21.0) enables unauthenticated remote attackers to cre

CVE-2026-18234 MEDIUM POC
6.5 Aug 29

Broken order authorization in MStore API WordPress plugin (before 4.21.1) allows any authenticated user, including low-p

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