CVE-2026-4080— Easy Cart <= 1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
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I. Basic Information for CVE-2026-4080
Vulnerability Information
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Vulnerability Title
Easy Cart <= 1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Easy Cart plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'add_to_cart' shortcode in all versions up to and including 1.8. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the ectp_add_to_cart() function uses sanitize_text_field() on shortcode attributes like 'itemid', 'product_name', 'product_desc', 'product_qty', and 'price' before inserting them into double-quoted HTML attributes. While sanitize_text_field() strips HTML tags, it does not escape double quote characters, allowing an attacker to break out of the HTML attribute context and inject arbitrary event handlers. 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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-4080
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Patches & Fixes for CVE-2026-4080 (9)
Other References for CVE-2026-4080 (3)
Other References for CVE-2026-4080 (1)
IV. Related Vulnerabilities
Same weakness: CWE-79
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React Router vulnerable to XSS in unstable RSC redirect hand - CVE-2026-33244
React Router has stored XSS via unescaped Location header in - CVE-2026-28116
WordPress Progress Planner plugin <= 1.9.0 - Cross Site Scri
V. Comments for CVE-2026-4080
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