Popupkit <= 2.2.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Subscriber Data Deletion

Missing Authorization
CVE CVE-2025-14441
CVSS Medium (5.3)
Publicly Published January 5, 2026
Last Updated January 6, 2026
Researcher Athiwat Tiprasaharn (Jitlada)
Description

The Popupkit plugin for WordPress is vulnerable to arbitrary subscriber data deletion due to missing authorization on the DELETE `/subscribers` REST API endpoint in all versions up to, and including, 2.2.0. This is due to the `permission_callback` only validating wp_rest nonce without checking user capabilities. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary subscriber records.

References

1 affected software package

Software Type Plugin
Software Slug popup-builder-block (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 2.2.0
Patched Version
  • 2.2.1
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