WordPress security changelog
MEDIUM CVE-2026-2433 Deferred

RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging: Cross-site scripting

RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 6.1 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging
Plugin slug
wp-rss-aggregator
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Mar 07, 2026
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Mar 07, 2026 and is one of 10 known issues for this plugin.

What to do

Update, patch or deactivate.

Update RSS Aggregator – RSS Import, News Feeds, Feed to Post, and Autoblogging to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Primary and upstream sources