CVE-2021-47933
📛 CVE Title
(no title)
Description
WordPress MStore API 2.0.6 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by sending POST requests to the REST API endpoint. Attackers can upload PHP files with arbitrary names to the config_file endpoint to achieve remote code execution on the server.
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- critical
- CVSS score
- 9.8 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Effective score
- 9.8 / 10 CRITICAL source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- —
- Last updated
- —
- Source
- https://www.tenable.com/cve/CVE-2021-47933
- Linked Threat
- CVE-2021-47933 — CVE-2021-47933
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-10 13:16:29 UTC
- NVD last modified
- 2026-05-12 14:24:15 UTC
- NVD CVSS v3.1
- 9.8 / 10 CRITICAL source: disclosure@vulncheck.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0022 (probability of exploitation in next 30 days)
- EPSS percentile
- 44.09% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-306
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-24 23:58 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2021-34795 - Assigner
- VulnCheck
- Published
- May 10, 2026, 12:43:53 PM
- Updated
- May 11, 2026, 1:23:52 PM
- EUVD base score (CVSS 4.0)
-
9.3 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - EUVD-reported EPSS
- 0.2200
- Vendors
- mstore
- Products
-
MStore API (2.0.6)
ENISA description: WordPress MStore API 2.0.6 contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by sending POST requests to the REST API endpoint. Attackers can upload PHP files with arbitrary names to the config_file endpoint to achieve remote code execution on the server.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2021-47933 tenable:nvd.nist.gov
- https://wordpress.org/plugins/mstore-api/ tenable:wordpress.org
- https://www.cve.org/CVERecord?id=CVE-2021-47933 tenable:www.cve.org
- https://www.exploit-db.com/exploits/50379 tenable:www.exploit-db.com
- https://www.first.org/epss/ tenable:www.first.org
- https://www.vulncheck.com/advisories/wordpress-mstore-api-arbitrary-file-upload tenable:www.vulncheck.com
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://wordpress.org/plugins/mstore-api/ disclosure@vulncheck.com
- https://www.exploit-db.com/exploits/50379 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/wordpress-mstore-api-arbitrary-file-upload disclosure@vulncheck.com
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:community.ui.com
Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...
2026-05-26 02:51 UTC -
web:csrc.nist.gov
Enterprise patch management is the process of identifying, prioritizing, acquiring, installing, and verifying the installation of patches, updates, and upgrades throughout an organization. Patching is more important than ever because of the increasing reliance on technology, but there is often a divide between business/mission owners and security/technology management about the value of ...
2026-05-26 02:51 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-26 02:51 UTC -
web:pureinfotech.com
Fix Windows 11 stuck in BitLocker recovery screen To fix the issue with the BitLocker recovery screen on Windows 11, you would need another computer ( or a mobile phone) with internet access, and then follow these steps: Open your Microsoft account online. Confirm the computer's name from the list to find the recovery key.
2026-05-26 02:51 UTC -
web:securityboulevard.com
Cybersecurity vulnerabilities pose significant risks to organizations in today's digital landscape. Left unaddressed, these vulnerabilities can lead to data breaches, financial losses, and reputational damage. Organizations must decide how to tackle vulnerabilities—through remediation , mitigation , or a combination of both. But which strategy is more effective? This blog explores the ...
2026-05-26 02:51 UTC -
web:www.esd.whs.mil
Ensure configuration, asset, remediation , and mitigation management supports vulnerability management within the DODIN in accordance with DoD Instruction (DoDI) 8510.01. Support all systems, subsystems, and system components owned by or operated on behalf of DoD with efficient vulnerability assessment techniques, procedures, and capabilities.
2026-05-26 02:51 UTC -
web:www.howtogeek.com
In this case, launch the app as an administrator to fix the problem. To do that, right-click the app on your desktop or Start Menu and choose "Run as Administrator." In the User Account Control (UAC) prompt, select "Yes." Use App Compatibility Troubleshooter It's possible the app is not compatible with your Windows 11 system, causing your issue.
2026-05-26 02:51 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-26 02:51 UTC -
web:www.prajwaldesai.com
Discover effective methods to repair SCCM client agent, including PowerShell scripts, command line, Right-Click Tools, and Advanced Insights for seamless troubleshooting.
2026-05-26 02:51 UTC -
web:www.windowscentral.com
A faulty BitLocker configuration is forcing some PCs into BitLocker recovery mode after the April 2026 update, but there's a workaround to resolve this issue.
2026-05-26 02:51 UTC
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