CVE-2026-100107 describes a stored cross-site scripting vulnerability in the Kubio AI Page Builder plugin for WordPress, affecting all versions up to and including 2.9.2. The vulnerability is due to improper neutralization of input during web page generation, specifically via the 'comment' parameter. This allows unauthenticated attackers to inject arbitrary web scripts that execute in the context of users visiting the compromised pages. The CVSS 3.1 base score is 7.2, reflecting a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality and integrity with scope changed.

Successful exploitation enables unauthenticated attackers to execute arbitrary scripts in the browsers of users who visit the injected pages. This can lead to theft of sensitive information, session hijacking, or other malicious actions performed with the privileges of the affected user. The vulnerability does not impact availability.

No official patch or remediation information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider disabling or removing the Kubio AI Page Builder plugin or applying any available workarounds from the vendor. Monitoring for updates from extendthemes is recommended.