popupbuilder Popup Builder Plugin up to 4.4.5 on WordPress SGPopup::find sg_popup_preview_id authorization

Summaryinfo

A vulnerability, which was classified as critical, was found in popupbuilder Popup Builder Plugin up to 4.4.5. Affected is the function SGPopup::find of the component Popup Builder. Such manipulation of the argument sg_popup_preview_id leads to authorization. This vulnerability is traded as CVE-2026-89270. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in popupbuilder Popup Builder Plugin up to 4.4.5 and classified as critical. Affected by this issue is the function SGPopup::find of the component Popup Builder. The manipulation of the argument sg_popup_preview_id with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is integrity, and availability. CVE summarizes:

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, 4.4.5 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to trash all published popups on the site with a single unauthenticated GET request. The attack is amplified by a second flaw in SGPopup::find(), which returns false for every normally published popup when the sg_popup_preview_id parameter is present, causing the trash branch to fire against every popup on the site simultaneously.

The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-89270 since 09/11/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/31/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• popupbuilder

Name

• Popup Builder Plugin

Version

• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5

CPE 2.3info

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CPE 2.2info

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