CVE-2023-6877: Themeisle Rss Aggregator By Feedzy

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcode(s) in all versions up to, and including, 4.3.3 due to insufficient input sanitization and output escaping on the Content-Type field of error messages when retrieving an invalid RSS feed. 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.

Affected products

• Themeisle Rss Aggregator By Feedzy: before 4.3.4 (fixed in 4.3.4)

Published 2024-04-07. Last modified 2026-06-17.