CVE-2026-9629: Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute
The Canvas plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tag' parameter in all versions up to, and including, 2.5.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-9629?
CVE-2026-9629 has a medium severity rating of 6.4.
How do I fix CVE-2026-9629?
To fix CVE-2026-9629, update the Canvas plugin to the latest version beyond 2.5.2.
What type of vulnerability is CVE-2026-9629?
CVE-2026-9629 is an authenticated Stored Cross-Site Scripting vulnerability.
Who can exploit CVE-2026-9629?
CVE-2026-9629 can be exploited by authenticated users with contributor-level access and above.
What is affected by CVE-2026-9629?
CVE-2026-9629 affects all versions of the Canvas plugin for WordPress up to and including 2.5.2.