CVE-2026-9629 is a stored cross-site scripting vulnerability in the Canvas WordPress plugin by codesupplyco. It affects all versions up to and including 2.5.2. The issue is due to improper neutralization of input during web page generation, specifically via the 'tag' parameter. Authenticated attackers with contributor-level privileges or above can inject malicious scripts that execute in the context of users viewing the injected pages. The CVSS 3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, and privileges required at the contributor level. There is no official remediation or patch currently documented.

An attacker with contributor-level access can inject persistent malicious scripts via the 'tag' parameter, which execute in the browsers of users who visit the compromised pages. This can lead to information disclosure and integrity impacts limited to the affected site context. There is no indication of availability impact. The vulnerability requires authentication and is not exploitable by unauthenticated users.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider implementing additional input validation or output encoding controls on the 'tag' parameter if possible.