Popup Builder – Create highly converting, mobile friendly marketing popups: A security weakness
Popup Builder – Create highly converting, mobile friendly marketing popups is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation.
- Component
- Popup Builder – Create highly converting, mobile friendly marketing popups
- Plugin slug
popup-builder- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Feb 19, 2026
This CVE was published Feb 19, 2026 and is one of 22 known issues for this plugin.
Update, patch or deactivate.
Update Popup Builder – Create highly converting, mobile friendly marketing popups 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.
Technical description
The Popup Builder – Create highly converting, mobile friendly marketing popups. plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.4.2. This is due to the plugin generating predictable unsubscribe tokens using deterministic data. This makes it possible for unauthenticated attackers to unsubscribe arbitrary subscribers from mailing lists via brute-forcing the unsubscribe token, granted they know the victim's email address
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N