Popup Builder <= 3.72 Missing Authorization on AJAX actions

2021-01-28 00:00
Patchstack

Strategic Overview

Status
Patched in 3.72
Affected Plugin
Popup Builder – Create highly converting, mobile friendly marketing popups.
Affected Version
<= 3.71
CVSS
6.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE pending
View all Popup Builder – Create highly converting, mobile friendly marketing popups. vulnerabilities

At a glance

This record tracks a medium-severity Missing Authorization vulnerability in the Popup Builder WordPress plugin, affecting versions <= 3.71. It carries a CVSS score of 6.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 3.72; sites on affected versions should update now. Disclosed January 2021, reported by Patchstack.

Vulnerability Overview

The Popup Builder plugin for WordPress is vulnerable to authorization bypass in versions up to, and including 3.71 due to missing capability checks on various actions called via AJAX. This makes it possible for attackers to import subscribers and send newsletters among other actions.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Popup Builder <= 3.71 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Popup Builder the fix is 3.72: builds <= 3.71 are affected, anything from 3.72 onward is not.

Remediation

Update to version 3.72, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Popup Builder 3.72 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/ec0fff2a-602d-441b-89d1-64d609a4abc0

Related records

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