s2Member <= 261011 - Authenticated (Contributor+) Stored Cross-Site Scripting via s2Get Shortcode

ID

WPSEC-2026-1209

Plugin

s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions (s2member)

Affected

all versions before 261017

Remediation

Update to 261017 or later.

CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Weakness

CWE-79

Usage

Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-17

Attack surface

s2Member on WPSec AttackSurface

Fix released

2026-10-17

Published

2026-10-18

Description

The s2Member plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [s2Get] shortcode in all versions up to, and including, 261011 due to insufficient output escaping of the formatted 'date_format' output and of returned constant and user field values. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

• https://wpsec.com/vuln/WPSEC-2026-1209/
• https://plugins.svn.wordpress.org/s2member/tags/261017/
• https://wordpress.org/plugins/s2member/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

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