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CVE-2026-9629— Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute

Quick assessment

Affected
codesupplyco Canvas
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

codesupplyco Canvas是codesupplyco公司的一款功能强大、特性丰富的基于区块的页面构建器。 codesupplyco Canvas 2.5.2之前版本存在跨站脚本漏洞，该漏洞源于输入过滤与输出转义机制不完善，存在可通过「tag」参数触发的存储型跨站脚本。

CVSS 6.4 · Medium EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
codesupplyco Canvas ≤ 2.5.2 affected
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I. Basic Information for CVE-2026-9629

Vulnerability Information
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Vulnerability Title
Canvas <= 2.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Block Attribute
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
codesupplyco Canvas 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
codesupplyco Canvas是codesupplyco公司的一款功能强大、特性丰富的基于区块的页面构建器。 codesupplyco Canvas 2.5.2之前版本存在跨站脚本漏洞，该漏洞源于输入过滤与输出转义机制不完善，存在可通过「tag」参数触发的存储型跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
codesupplyco Canvas 0 ~ 2.5.2 -

II. Public POCs for CVE-2026-9629

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III. Intelligence Information for CVE-2026-9629

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Patches & Fixes for CVE-2026-9629 (1)

Vendor Advisories for CVE-2026-9629 (1)

IV. Related Vulnerabilities

Same vendor: codesupplyco
Same weakness: CWE-79

V. Comments for CVE-2026-9629

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