CodePeople Calculated Fields Form Plugin up to 5.5.1.3 on WordPress GETURLPARAMETER x cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in CodePeople Calculated Fields Form Plugin up to 5.5.1.3. Affected by this vulnerability is the function GETURLPARAMETER. Performing a manipulation of the argument x results in cross site scripting. This vulnerability was named CVE-2026-100179. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in CodePeople Calculated Fields Form Plugin up to 5.5.1.3. This affects the function GETURLPARAMETER. The manipulation of the argument x with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

The Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'x (any URL parameter consumed by the form's calculated equation)' parameter in all versions up to, and including, 5.5.1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the target site to have a public form configured with a Select2-enabled dropdown whose choices are populated via a calculated equation that pipes a URL parameter through GETURLPARAMETER() into setChoices({texts:[...]}); given that configuration, exploitation requires only a single crafted link.

The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-100179 since 09/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

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

• CodePeople

Name

• Calculated Fields Form Plugin

Version

• 5.5.1.0
• 5.5.1.1
• 5.5.1.2
• 5.5.1.3

CPE 2.3info

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CPE 2.2info

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