Advanced Menu Manager <= 2.9.6 - Cross-Site Request Forgery to Menu Edition

2021-07-12 00:00
WPScanTeam

Strategic Overview

Status
Patched in 3.0
Affected Plugin
Advanced Menu Manager Pro – Built for Content-heavy WordPress Sites to Add, Filter, Lock, and Edit Menus Easily
Affected Version
<= 2.9.6
CVSS
8.8High
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE pending
View all Advanced Menu Manager Pro – Built for Content-heavy WordPress Sites to Add, Filter, Lock, and Edit Menus Easily vulnerabilities

At a glance

This record tracks a high-severity Cross-Site Request Forgery (CSRF) vulnerability in the Advanced Menu Manager Pro WordPress plugin, affecting versions <= 2.9.6. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 3.0; sites on affected versions should update now. Disclosed July 2021, reported by WPScanTeam.

Vulnerability Overview

The Advanced Menu Manager plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.9.6. This is due to missing or incorrect nonce validation on the 'amm_save_existing_menu' function. This makes it possible for unauthenticated attackers to edit the vulnerable services menu via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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 privileges on the target site. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-352: Cross-Site Request Forgery (CSRF)

Advanced Menu Manager Pro <= 2.9.6 carries this weakness at amm_save_existing_menu, and reaching it takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Advanced Menu Manager Pro the fix is 3.0: builds <= 2.9.6 are affected, anything from 3.0 onward is not.

Remediation

Update to version 3.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Advanced Menu Manager Pro: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Advanced Menu Manager Pro 3.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/3d5c5511-570e-4048-8c1b-68cfc831f0c6

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