Cross-Site Scripting Vulnerability in Simple Membership Plugin by WordPress
CVE-2026-15931

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Simple Membership
Vendor
CVE Published:
3 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-15931?

The Simple Membership plugin for WordPress allows unauthenticated users to send a malicious payment approval request, which includes an unsanitized subscriber name. This leads to the potential execution of arbitrary JavaScript in an administrator's session. Because the plugin doesn't properly escape the subscriber name when displaying it in the admin dashboard, it exposes the site to Cross-Site Scripting (XSS) attacks, heightening the risk of unauthorized actions taken by attackers during an administrator's session.

Affected Version(s)

Simple Membership 0 < 4.7.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-15931 - Proof of Concept

References

https://wpscan.com/vulnerability/30779ecc-779c-4e7c-9e8b-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yaswanth Reddy Sunkara
WPScan
.