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Mstore Api - Authentication Bypass (CVE-2021-24148)

CVE-2021-24148

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.

CVE-2021-24148

CRITICAL CVSS 9.8 Published 2021-03-18 Updated 2026-06-17
AI Risk Critical (96/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P1 Immediate
Severity Band CRITICAL
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Components 2
Reference Links 1
AI Risk Engine Critical (96/100)
Exploitability High
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2021-03-18 CVE published and first recorded in the threat feed.
  2. 2026-06-17 Record updated with latest vulnerability metadata.
  3. 2026-04-12 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 216 days ago

AI enriched 216 days ago (2026-04-12 02:57 UTC)

Technical Summary

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.

Potential Impact

Severity is CRITICAL (CVSS 9.8). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as High based on low-bar exploit prerequisites.

Primary risk drivers: low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

AI risk score 96/100 (Critical, High) with priority P1 Immediate. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Mstore Api PLUGIN · mstore-api Affected: < 3.2.0 Fixed in: 3.2.0
MStore API WordPress PLUGIN · mstore-api-wordpress Affected: < 3.2.0 Fixed in: 3.2.0

References

What to do about this

Patch immediately Serious, and reachable without meaningful privilege.

Fix it

Update Mstore Api to 3.2.0 or later.

That is the complete fix. Everything below is what protects you in the meantime.

Cannot update today? Administrator multi-factor authentication in Hack Halt Pro blocks this class of attack before WordPress processes the request.

Require a second factor for every administrator account. This is the single highest-value control against credential stuffing and reused passwords, because a valid password alone stops being enough.

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Not sure if you are affected?

Scan your site to see whether it runs Mstore Api, and at which version.

Free, no installation, no account. It reads what your site already publishes, then tells you which plugins carry known vulnerabilities and what to do about each one.

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Am I affected by this vulnerability?

You are affected if your site runs Mstore Api. Versions below 3.2.0 are vulnerable; that release and later are not. No account is needed to exploit this, so a public site is reachable by anyone.

How do I fix it?

Update Mstore Api to version 3.2.0 or later. That is the complete fix. Until you can update, Administrator multi-factor authentication in Hack Halt Pro contains this class of attack at the request layer.

What can an attacker actually do?

This is a Authentication Bypass flaw. An attacker who exploits it can sign in as another user, frequently an administrator, without a password.