CVE-2024-11376: s2member XSS — Fix

Description

The s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 241114. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

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CVSS v3.1 Score

6.1

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
clavaque	s2member	< 250214

References

Advisories & Patches

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3240794%40s2member&new=3240794%40s2member&sfp_email=&sfph_mail=#file1

Other References

https://plugins.trac.wordpress.org/browser/s2member/tags/241114/s2member.php#L210 https://www.wordfence.com/threat-intel/vulnerabilities/id/0a5c8f46-a686-4b77-8a22-8dec92a96350?source=cve

Frequently Asked Questions

What is CVE-2024-11376? +

The s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 241114. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2024-11376? +

CVE-2024-11376 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-11376? +

CVE-2024-11376 affects products from clavaque, specifically: s2member. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-11376? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-11376