CVE-2026-104909 kitae-park CVE debrief

Who should care

WordPress site administrators and defenders who use the Mang Board plugin should assess their exposure and apply patches or mitigations as necessary. This includes reviewing system logs for suspicious activity, verifying the patch level of their installations, and considering additional security measures such as limiting access to sensitive files or enhancing authentication mechanisms. Security teams responsible for managing WordPress sites should also be

Why it matters

CVE-2026-104909 is a high-severity Local File Inclusion vulnerability in the Mang Board plugin for WordPress. It allows unauthenticated attackers to execute arbitrary PHP code, potentially leading to code execution, data exposure, or access bypass. WordPress administrators and defenders should prioritize patching or mitigating this vulnerability to prevent potential exploitation.

• Potential code execution on the server
• Possible sensitive data exposure
• Risk of access control bypass for .php files
• Need for verification of patch application and system integrity

Technical summary

The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 2.4.3 via the '<mode>_type' parameter. This allows unauthenticated attackers to include and execute arbitrary .php files on the server, potentially leading to code execution, sensitive data exposure, or access control bypass. The vulnerability is caused by insufficient sanitization of user input in the '<mode>_type' parameter, allowing attackers to traverse the file system and include arbitrary files. No nonce or capability check is enforced on the shortcode render path, making exploitation trivial via an unauthenticated POST to any page rendering a public [mb_board] shortcode.

Defensive priority

High priority for WordPress site administrators and defenders to assess exposure and apply patches or mitigations.

Recommended defensive actions

• Assess exposure by checking if the Mang Board plugin version is 2.4.3 or lower.
• Apply patches or updates to Mang Board plugin to version higher than 2.4.3.
• Monitor for suspicious activity, especially unauthenticated POST requests to pages with the [mb_board] shortcode.
• Consider implementing additional security measures for WordPress sites, such as limiting access to sensitive files or enhancing authentication mechanisms.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its impact and affected versions. However, specific details on exploitation or victim data are not provided. The vulnerability is confirmed to exist in Mang Board plugin versions up to and including 2.4.3. Defenders should verify the patch level of their installations and review system logs for suspicious activity. The CVE Program and NVD provide additional context and guidance on this vulnerability.

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.