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

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CVE CVE-2025-4126
CVSS Medium (6.4)
Publicly Published May 14, 2025
Last Updated May 15, 2025
Researcher Muhammad Yudha - DJ
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug eg-series (view on wordpress.org)
Patched? No
Affected Version
  • <= 2.1.1
Patched Version
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