CVE-2026-9629
Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute
- State
- Published
- Severity
- 6.4 Medium
- Published
- Jun 13, 2026
- Updated
- Jun 15, 2026
- Reserved
- May 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Canvascodesupplyco |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f93d70e4-01c5-44e8-b7d5-0837bee53b8d?source=cve
- https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/components/basic-elements/block-section-heading/render.php#L32
- https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/components/basic-elements/block-section-heading/render.php#L13
- https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/gutenberg/custom-blocks/index.php#L798
- https://plugins.trac.wordpress.org/changeset/3553553/canvas/trunk/components/basic-elements/block-section-heading/render.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fcanvas/tags/2.5.2&new_path=%2Fcanvas/tags/2.5.3
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