EG-Series <= 2.1.1 — Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under EG-Series.
• No admin access? Run a passive check of your site. It reads public files only.

What to do

1. No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch EG-Series to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Muhammad Yudha - DJ.

The EG-Series plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [series] shortcode in all versions up to, and including, 2.1.1 due to insufficient input sanitization and output escaping on user supplied attributes in the shortcode_title function. This makes it possible for authenticated attackers - with contributor-level access and above, on sites with the Classic Editor plugin activated - to inject arbitrary JavaScript code in the titletag attribute that will execute whenever a user access an injected page.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Timeline

1. May 14, 2025

   CVE published

   Severity medium, CVSS 6.4

2. Nov 13, 2026

   Record last updated