Mang Board Plugin up to 2.4.3 on WordPress admin-ajax.php content cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in Mang Board Plugin up to 2.4.3. Affected by this vulnerability is an unknown functionality of the file admin-ajax.php. The manipulation of the argument content leads to cross site scripting. This vulnerability is documented as CVE-2026-109998. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Mang Board Plugin up to 2.4.3. It has been rated as problematic. This issue affects some unknown processing of the file admin-ajax.php. The manipulation of the argument content with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable because the wp_ajax_nopriv_mb_template endpoint is publicly accessible without authentication, nonce verification is not enforced for the content_reply mode, and admin-ajax.php responds with Content-Type: text/html, causing browsers to execute injected tags embedded in the JSON response body.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-109998 since 10/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:admin-ajax.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• Mang Board Plugin

Version

• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
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