WordPress Popup Maker Vulnerability Impacts Approximately +700,000 Websites

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The U.S. federal government National Vulnerability Database released an advisory about a Stored Cross-Site Scripting vulnerability in the popular Popup Maker plugin for WordPress.

Popup Maker for WordPress

A vulnerability was discovered in the “Popup Maker– Popup for opt-ins, lead gen, & more” WordPress plugin which is set up in over 700,000 websites.

The Popup Maker plugin incorporates with many of the most popular contact types with functions created to drive conversions in WooCommerce stores, e-mail newsletter signups and other popular applications related to lead generation.

Although the plugin has actually just been around considering that 2021 it has experienced phenomenal development and earned over 4,000 first-class reviews.

Popup Maker Vulnerability

The vulnerability affecting this plugin is called stored cross-site scripting (XSS). It’s called “saved” due to the fact that a destructive script is uploaded to the site and stored on the server itself.

XSS vulnerabilities usually occur when an input stops working to sanitize what is being submitted. Anywhere that a user can input data is can end up being vulnerable there is an absence of control over what can be published.

This specific vulnerability can take place when a hacker can get the credentials of a user with a minimum of a contributor level of gain access to starts the attack.

The U.S. Federal Government National Vulnerability Database describes the factor for the vulnerability and how an attack can occur:

“The Popup Maker WordPress plugin before 1.16.9 does not confirm and escape one of its shortcode qualities, which could allow users with a function as low as contributor to perform Stored Cross-Site Scripting attacks.”

A main changelog released by the plugin author indicates that the make use of enables a person with factor level access to run JavaScript.

The Popup Maker Plugin changelog for version V1.16.9 notes:

“Security: Patched XSS vulnerability enabling contributors to run unfiltered JavaScript.”

Security company WPScan (owned by Automattic) released an evidence of principle that shows how the exploit works.

“As a factor, put the following shortcode in a post/page

[pum_sub_form name_field_type=”fullname” label_name=”Name” label_email=”Email” label_submit=”Subscribe” placeholder_name=”Call” placeholder_email=”Email” form_layout=”block” form_alignment=”center” form_style=”default” privacy_consent_enabled=”yes” privacy_consent_label=”Alert me about associated material and special offers.” privacy_consent_type=”radio” privacy_consent_radio_layout=”inline” privacy_consent_yes_label=”Yes” privacy_consent_no_label=”No” privacy_usage_text=”If you decide in above we use this information send associated content, discount rates and other special offers.” redirect_enabled redirect=”javascript: alert(/ XSS/)”]

The XSS will be triggered when previewing/viewing the post/page and sending the kind”

While there is no description of how bad the exploit can be, in basic, Stored XSS vulnerabilities can have severe consequences consisting of complete website takeover, user information direct exposure and the planting of Trojan horse programs.

There have been subsequent updates considering that the original spot was released for version 1.16.9, including a more recent update that fixes a bug that was introduced with the security patch.

The most present variation of the Popup Maker plugin is V1.17.1.

Publishers who have the plugin installed must consider updating the most recent variation.


Check Out the U.S. Government National Vulnerability Database advisory:

CVE-2022-4381 Detail

Check Out the WPScan Advisory

Popup Maker < 1.16.9-- Factor+ Saved XSS via Subscription Form

Featured image by Best SMM Panel/Asier Romero