PT-2026-49087 · WordPress · Canvas

Dj + 1 · CVE-2026-9629 · Published 2026-06-13 · Updated 2026-06-16

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Canvas plugin for WordPress versions prior to 2.5.3

Description Stored Cross-Site Scripting occurs due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts via the tag parameter. These scripts execute whenever a user accesses the affected page.

Recommendations Update the plugin to a version later than 2.5.2. As a temporary workaround, restrict access to the tag parameter for users with contributor-level permissions.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-9629

Affected Products

Canvas

References · 12

• https://nvd.nist.gov/vuln/detail/CVE-2026-9629 · Security Note
• https://t.me/cveNotify/167356 · Telegram Post
• https://twitter.com/vuldb/status/2066057778893128055 · Twitter Post
• https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/components/basic-elements/block-section-heading/render.php#L32 · Note
• https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/gutenberg/custom-blocks/index.php#L798 · Note
• https://twitter.com/CVEnew/status/2065840865608618015 · Twitter Post
• https://plugins.trac.wordpress.org/changeset?old_path=%2Fcanvas/tags/2.5.2&new_path=%2Fcanvas/tags/2.5.3 · Note
• https://t.me/cveNotify/167506 · Telegram Post
• https://plugins.trac.wordpress.org/changeset/3553553/canvas/trunk/components/basic-elements/block-section-heading/render.php · Note
• https://plugins.trac.wordpress.org/browser/canvas/tags/2.5.2/components/basic-elements/block-section-heading/render.php#L13 · Note
• https://t.me/CVEtracker/56794 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/f93d70e4-01c5-44e8-b7d5-0837bee53b8d?source=cve · Note