CVE-2023-51356

ARMember <= 4.0.10 - Authenticated(Subscriber+) Privilege Escalation

2023-12-26 00:00
Revan Arifio

Strategic Overview

Status
Patched in 4.0.11
Affected Plugin
ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup
Affected Version
<= 4.0.10
CVSS
8.8High
Weakness type
CWE-20 · Improper Input Validation
CVE
CVE-2023-51356
View all ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup vulnerabilities

At a glance

CVE-2023-51356 is a high-severity Improper Input Validation vulnerability in the ARMember WordPress plugin, affecting versions <= 4.0.10. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.0.11; sites on affected versions should update now. Disclosed December 2023, reported by Revan Arifio.

Vulnerability Overview

The ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup plugin for WordPress is vulnerable to privilege escalation due to insufficient input validation in all versions up to, and including, 4.0.10. This makes it possible for authenticated attackers, with subscriber access and above, to escalate their privileges.

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

CWE-20: Improper Input Validation

Reaching this weakness in ARMember <= 4.0.10 takes an account at Subscriber level or above. Improper input validation means the application accepts input without confirming it has the form, type or range the code downstream assumes.

The concrete impact depends on where the unvalidated value lands, which is why records in this class range from cosmetic bugs to full compromise. For ARMember the fix is 4.0.11: builds <= 4.0.10 are affected, anything from 4.0.11 onward is not.

Remediation

Update to version 4.0.11, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ARMember 4.0.11 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-51356https://www.wordfence.com/threat-intel/vulnerabilities/id/c681d1ac-a5d0-43f2-a1e4-0684cd56a3b8https://nvd.nist.gov/vuln/detail/CVE-2023-51356

Related records

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