CVE-2021-24526

Form Maker <= 1.13.59 - Authenticated Stored Cross-Site Scripting

2021-07-15 00:00
Felipe Restrepo Rodriguez (pfelilpe)

Strategic Overview

Status
Patched in 1.13.60
Affected Plugin
Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder
Affected Version
<= 1.13.59
CVSS
5.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24526
View all Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder vulnerabilities

At a glance

CVE-2021-24526 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Form Maker by 10Web WordPress plugin, affecting versions <= 1.13.59. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 1.13.60; sites on affected versions should update now. Disclosed July 2021, reported by Felipe Restrepo Rodriguez (pfelilpe).

Vulnerability Overview

The Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder WordPress plugin before 1.13.60 does not escape its Form Title before outputting it in an attribute when editing a form in the admin dashboard, leading to an authenticated Stored Cross-Site Scripting issue

Technical Analysis

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

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

Reaching this weakness in Form Maker by 10Web <= 1.13.59 takes any authenticated account. 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 Form Maker by 10Web the fix is 1.13.60: builds <= 1.13.59 are affected, anything from 1.13.60 onward is not.

Remediation

Update to version 1.13.60, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Form Maker by 10Web: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Form Maker by 10Web 1.13.60 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24526https://www.wordfence.com/threat-intel/vulnerabilities/id/3c3091eb-a2e7-4fc2-9f5c-5d6d582bbb89https://nvd.nist.gov/vuln/detail/CVE-2021-24526

Related records

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