SiteOrigin Widgets Bundle Plugin up to 1.73.2 on WordPress REST Endpoint previews update_fields theme unrestricted upload

Summaryinfo

A vulnerability was found in SiteOrigin Widgets Bundle Plugin up to 1.73.2. It has been rated as critical. This affects the function update_fields of the file /wp-json/sowb/v1/widgets/previews of the component REST Endpoint. The manipulation of the argument theme leads to unrestricted upload. This vulnerability is uniquely identified as CVE-2026-92174. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in SiteOrigin Widgets Bundle Plugin up to 1.73.2. It has been rated as critical. This issue affects the function update_fields of the file /wp-json/sowb/v1/widgets/previews of the component REST Endpoint. The manipulation of the argument theme with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The SiteOrigin Widgets Bundle plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 1.73.2 via the 'theme' parameter parameter. This makes it possible for authenticated attackers, with contributor-level access and above, to include and execute arbitrary .php files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where .php file types can be uploaded and included. Exploitation requires sending a malicious widgetData payload containing a legacy top-level theme key alongside a non-empty columns array to the /wp-json/sowb/v1/widgets/previews REST endpoint, which bypasses field validation because update_fields() only processes declared form fields.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-92174 since 09/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/02/2026). MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-91178). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• SiteOrigin

Name

• Widgets Bundle Plugin

Version

• 1.73.0
• 1.73.1
• 1.73.2

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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