CVE-2024-1985: Simple Membership <= 4.4.2 - Unauthenticated Stored Self-Based Cross-Site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-13 · updated 2026-06-17
Weakness: CWE-79

Description

The Simple Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Display Name' parameter in all versions up to, and including, 4.4.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability requires social engineering to successfully exploit, and the impact would be very limited due to the attacker requiring a user to login as the user with the injected payload for execution.

Affected products

Simple Membership: before 4.4.3 — fixed in 4.4.3

How to fix

Upgrade to a fixed version: Simple Membership 4.4.3. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-1985 or the next vulnerability affects your stack