CVE-2026-15782

WPForms <= 2.0.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via OptinMonster Integration data-sitekey Attribute in Post Content

2026-07-20 16:53
Asaf Mozes

Strategic Overview

Status
Patched in 2.0.0.2
Affected Plugin
WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More
Affected Version
<= 2.0.0.1
CVSS
4.9Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-15782
View all WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More vulnerabilities

At a glance

CVE-2026-15782 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WPForms WordPress plugin, affecting versions <= 2.0.0.1. It carries a CVSS score of 4.9 (reachable over the network). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 2.0.0.2; sites on affected versions should update now. Disclosed July 2026, reported by Asaf Mozes.

Vulnerability Overview

The WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More plugin for WordPress is vulnerable to Stored Cross-Site Scripting via OptinMonster Integration data-sitekey Attribute in Post Content in all versions up to, and including, 2.0.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the OptinMonster plugin to be installed and configured with an active inline campaign that outputs matching #om-{id} markup on the target page, as the WPForms handler only fires when OptinMonster emits its 'om.Campaign.load' event.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in WPForms <= 2.0.0.1 takes an account at Contributor level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For WPForms the fix is 2.0.0.2: builds <= 2.0.0.1 are affected, anything from 2.0.0.2 onward is not.

Remediation

Update to version 2.0.0.2, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WPForms 2.0.0.2 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-15782https://www.wordfence.com/threat-intel/vulnerabilities/id/6d5264a1-dabf-4630-9871-ab6e14817768https://nvd.nist.gov/vuln/detail/CVE-2026-15782

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C