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CVE-2026-109219

9.8 · CRITICAL

The Mang Board plugin for WordPress is vulnerable to Arbitrary File Upload in version 2.4.4 via the mbw_file_upload function.

Published Oct 16, 2026CWE-434EPSS 0.69%

Overview

CVE-2026-109219 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Mang Board plugin for WordPress is vulnerable to Arbitrary File Upload in version 2.4.4 via the mbw_file_upload function. This is due to missing file extension validation on the attacker-supplied image_path parameter, whose basename-derived file name bypasses the extension allowlist applied only to the separate file_name parameter. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. Exploitation requires the board to be configured to allow guest posts, which is the plugin's default mode; the required nonce is printed on every public board page, making it readable by any unauthenticated visitor without a WordPress login.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refplugins.trac.wordpress.org/browser/mangboard/tags/2.4.4/api/mb-board.php#L428Refplugins.trac.wordpress.org/browser/mangboard/tags/2.4.4/includes/functions/func.api.php#L902Refplugins.trac.wordpress.org/browser/mangboard/tags/2.4.4/includes/functions/func.api.php#L903Refplugins.trac.wordpress.org/browser/mangboard/tags/2.4.4/includes/functions/func.api.php#L972Refplugins.trac.wordpress.org/browser/mangboard/tags/2.4.4/includes/mb-actions.php#L520Refplugins.trac.wordpress.org/changeset/3743247/mangboard/trunk/includes/functions/func.api.phpRefwordpress.org/plugins/mangboard/Refwww.wordfence.com/threat-intel/vulnerabilities/id/1e4f4860-b4c9-4f41-b1d0-0b2da8c88b99?source=cve

How CyberStrike helps

Frequently asked questions

What is CVE-2026-109219?

CVE-2026-109219 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-109219?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-109219?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-109219?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-109219 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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