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CVE-2026-2433— RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging <= 5.0.11 - Unauthenticated DOM-Based Reflected Cross-Site Scripting via postMessage

Quick assessment

Affected
rebelcode RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging
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.

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 RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging 5.0.11及之前版本存在跨站脚本漏洞，该漏洞源于缺少来源验证和URL方

CVSS 6.1 · Medium EPSS 0.21% · P11
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I. Basic Information for CVE-2026-2433

Vulnerability Information
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Vulnerability Title
RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging <= 5.0.11 - Unauthenticated DOM-Based Reflected Cross-Site Scripting via postMessage
Source: CVE Program / CVE List V5
Vulnerability Description
The RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via postMessage in all versions up to, and including, 5.0.11. This is due to the plugin's admin-shell.js registering a global message event listener without origin validation (missing event.origin check) and directly passing user-controlled URLs to window.open() without URL scheme validation. This makes it possible for unauthenticated attackers to execute arbitrary JavaScript in the context of an authenticated administrator's session by tricking them into visiting a malicious website that sends crafted postMessage payloads to the plugin's admin page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
WordPress plugin RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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 RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging 5.0.11及之前版本存在跨站脚本漏洞，该漏洞源于缺少来源验证和URL方
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
rebelcode RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging * ~ 5.0.11 -

II. Public POCs for CVE-2026-2433

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III. Intelligence Information for CVE-2026-2433

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Patches & Fixes for CVE-2026-2433 (5)

Vendor Advisories for CVE-2026-2433 (1)

IV. Related Vulnerabilities

Same product: RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging
Same vendor: rebelcode
Same weakness: CWE-79

V. Comments for CVE-2026-2433

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