All In One WP Security & Firewall <= 4.4.3 - Reflected Cross-Site Scripting

2020-09-08 00:00
Antony Garand

Strategic Overview

Status
Patched in 4.4.4
Affected Version
<= 4.4.3
CVSS
4.7Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE pending
View all All-In-One Security (AIOS) – Security and Firewall vulnerabilities

At a glance

This record tracks a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the All-In-One Security (AIOS) WordPress plugin, affecting versions <= 4.4.3. It carries a CVSS score of 4.7 (reachable over the network). Exploitation requires no authentication. The issue is fixed in version 4.4.4; sites on affected versions should update now. Disclosed September 2020, reported by Antony Garand.

Vulnerability Overview

The All In One WP Security & Firewall plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the tab parameter in versions up to, and including 4.4.3. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in administrative pages that execute if they can successfully trick a site administrator into performing an action such as clicking on a link. Please note that this was only exploitable on older browsers at the time of disclosure.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no privileges on the target site.

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

Reaching this weakness in All-In-One Security (AIOS) <= 4.4.3 takes a caller who can reach the endpoint. 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 All-In-One Security (AIOS) the fix is 4.4.4: builds <= 4.4.3 are affected, anything from 4.4.4 onward is not.

Remediation

Update to version 4.4.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to All-In-One Security (AIOS): WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: All-In-One Security (AIOS) 4.4.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

Related records

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