CVE-2026-109219 kitae-park CVE debrief

Who should care

WordPress site administrators and defenders who use the Mang Board plugin should verify exposure and apply remediation. This vulnerability requires immediate attention due to its critical severity and potential for remote code execution.

Why it matters

CVE-2026-109219 is a critical vulnerability in the Mang Board plugin for WordPress, allowing arbitrary file uploads and potential remote code execution. WordPress site administrators and defenders should verify exposure, review configurations, and apply remediation to prevent exploitation.

• Remote code execution is possible when the board allows guest posts
• Unauthenticated attackers can upload potentially executable files
• Missing file extension validation on the image_path parameter allows for bypassing of file_name parameter restrictions
• Verification of affected versions, configurations, and remediation is required

Technical summary

The Mang Board plugin for WordPress is vulnerable to Arbitrary File Upload due to missing file extension validation on the image_path parameter. This allows unauthenticated attackers to upload potentially executable files, leading to possible remote code execution when guest posts are allowed. The basename-derived file name bypasses the extension allowlist applied only to the separate file_name parameter. This issue requires verification of affected versions and configurations, and immediate attention due to its critical severity and potential for remote code execution.

Defensive priority

High priority for WordPress site administrators and defenders to verify exposure and apply remediation

Recommended defensive actions

• Verify if the Mang Board plugin version is 2.4.4 or earlier and update to a patched version if available.
• Check if the board is configured to allow guest posts and consider changing the configuration if not necessary.
• Monitor for suspicious file uploads and board activity.
• Review and restrict file upload permissions and validation on the board
• Perform thorough vulnerability scanning and penetration testing to identify potential entry points.
• Implement additional security measures such as web application firewalls and intrusion detection systems.
• Review and update incident response plans to address potential exploitation of this vulnerability.

Evidence notes

The vulnerability is due to missing file extension validation on the attacker-supplied image_path parameter. The basename-derived file name bypasses the extension allowlist applied only to the separate file_name parameter. This issue requires verification of affected versions and configurations.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.