CVE-2023-6882 Simple Membership <= 4.3.8 - Reflected Cross-Site Scripting Vulnerability via environment_mode

What is CVE-2023-6882?

CVE-2023-6882 is a medium-severity cross-site scripting vulnerability in wpinsider-1 Simple Membership, published on 11 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The Simple Membership plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘environment_mode’ parameter in all versions up to, and including, 4.3.8 due to insufficient input sanitization and output escaping. 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.

Weakness: CWE-79

Which versions are affected by CVE-2023-6882?

It affects 1 product.

Products include Simple-Membership-Plugin Simple Membership.

How do I fix CVE-2023-6882?

No fix has been published for CVE-2023-6882 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-6882 being exploited?

There is no known exploitation of CVE-2023-6882 in the wild and no public exploit code.

Other vulnerabilities in wpinsider-1 Simple Membership

• CVE-2022-2317 Simple Membership < 4.1.3 - Unauthenticated Membership Privilege Escalation Critical 9.8
• CVE-2023-41956 WordPress Simple Membership plugin <= 4.3.4 - Authenticated Account Takeover vulnerability High 8.8
• CVE-2022-2273 Simple Membership < 4.1.3 - Membership Privilege Escalation High 8.8
• CVE-2016-10884 Cross-site request forgery in n/a High 8.8
• CVE-2019-14328 Cross-site request forgery in n/a High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rgqm-fq86-cjh4.