Threat intelligence

Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute

CVE-2026-9629 · canvas

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Canvas at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute
Affected software: canvas(Plugin)
Affected versions: ≤ 2.5.2
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-9629
Published: 12 June 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory f93d70e4-01c5-44e8-b7d5-0837bee53b8d). Methodology and redistribution notes

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