Allow HTML in Category Descriptions Plugin up to 1.2.4 on WordPress wp_kses_data cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in Allow HTML in Category Descriptions Plugin up to 1.2.4 on WordPress. Impacted is the function wp_kses_data. The manipulation of the argument term_description/link_description/link_notes/user_description leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-0693. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Allow HTML in Category Descriptions Plugin up to 1.2.4 on WordPress. It has been rated as problematic. This issue affects the function wp_kses_data. The manipulation of the argument term_description/link_description/link_notes/user_description 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 Allow HTML in Category Descriptions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via category descriptions in all versions up to, and including, 1.2.4. This is due to the plugin unconditionally removing the `wp_kses_data` output filter for term_description, link_description, link_notes, and user_description fields without checking user capabilities. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in category descriptions that will execute whenever a user accesses a page where the category description is displayed. This only affects multi-site installations and installations where unfiltered_html has been disabled.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-0693. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• Allow HTML in Category Descriptions Plugin

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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