sameh101 Chatterbug Forms Plugin up to 1.0.2 on WordPress cbforms_check_form_submissions unrestricted upload

Summaryinfo

A vulnerability was found in sameh101 Chatterbug Forms Plugin up to 1.0.2. It has been rated as critical. This vulnerability affects the function cbforms_check_form_submissions. This manipulation causes unrestricted upload. This vulnerability is handled as CVE-2026-125055. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in sameh101 Chatterbug Forms Plugin up to 1.0.2. Affected by this vulnerability is the function cbforms_check_form_submissions. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the upload or transfer of dangerous file types that are automatically processed within its environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Chatterbug Forms – Fast, Flexible WordPress Form Builder plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.0.2 via the cbforms_check_form_submissions function. This is due to missing server-side file extension validation in cbforms_check_form_submissions(), where the allowed-type check defaults to the uploaded file's own extension when no field restriction is configured, trivially allowing any extension including .php. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The submission nonce printed inline on every public page containing a Chatterbug form is freely obtainable by unauthenticated visitors and therefore does not constitute an effective access control barrier.

The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-125055 since 11/09/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 11/13/2026). 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.

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

Productinfo

Type

• WordPress Plugin

Vendor

• sameh101

Name

• Chatterbug Forms Plugin

Version

• 1.0.0
• 1.0.1
• 1.0.2

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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