What the vulnerability does
01Description
The RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘className’ parameter in all versions up to, and including, 5.0.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Explanation of Vulnerability in Simple Terms
02Summary
The RSS Aggregator plugin for WordPress contains a cross-site scripting (XSS) vulnerability in versions up to 5.0.10. An attacker can inject malicious scripts into RSS feed content that execute in the browsers of site visitors. The vulnerability requires user interaction—typically a visitor viewing a page with the affected feed—and can affect other users on the site. Update to a version newer than 5.0.10 to resolve this issue.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts into RSS feeds that run in visitors' browsers and steal session cookies or perform actions on their behalf.
Potential impact on your site
04Site Impact
Visitors to your site could have their sessions hijacked or be redirected to malicious sites when viewing RSS-aggregated content.
Conditions required to exploit
05Prerequisites
No authentication required. A site visitor must view a page displaying the compromised RSS feed content.
Key dates
06Disclosure timeline
January 16, 2026
CVE published
April 8, 2026
Record updated
