CVE-2026-4895— Greenshift <= 12.8.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via disablelazy Attribute

Greenshift <= 12.8.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via disablelazy Attribute

The GreenShift - Animation and Page Builder Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 12.8.9 This is due to insufficient input sanitization and output escaping in the gspb_greenShift_block_script_assets() function. The function uses str_replace() to insert 'fetchpriority="high"' before 'src=' attributes when processing greenshift-blocks/image blocks with the disablelazy attribute enabled. Because this replacement operates on the entire HTML string without parsing, contributors can inject the string 'src=' into HTML attribute values (such as class attributes). When the str_replace executes, the double quotes in the replacement string break out of the attribute context, allowing injection of malicious HTML attributes like onfocus with JavaScript payloads. 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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

WordPress plugin GreenShift - Animation and Page Builder Blocks 跨站脚本漏洞

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin GreenShift - Animation and Page Builder Blocks 12.8.9及之前版本存在跨站脚本漏洞，该漏洞源于输入清理和输出转义不足，可能导致存储型跨站脚本攻击。

N/A

N/A