CVE-2023-6882: The Simple Membership plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘environmen

Q: How do I fix CVE-2023-6882?

simple membership: upgrade to newer than 4.3.8. Exact commands for each OS are on this page.

Q: Is CVE-2023-6882 being exploited?

CVE-2023-6882 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-6882 affect?

CVE-2023-6882 affects simple membership. Severity is medium (CVSS 6.1). 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 mak

Q: How urgent is CVE-2023-6882?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2023-6882 is a medium-severity flaw (CVSS 6.1) affecting simple membership. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-01-11
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: simple-membership-plugin

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-01-11 09:15 UTCPublished CVE record published
2026-06-17 06:51 UTCUpdated Record last modified

simple-membership-plugin simple membership UPGRADE

Affected: <= 4.3.8

Fixed in: newer than 4.3.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy simple-membership || rpm -q simple-membership || simple-membership --version

2. UPGRADE to newer than 4.3.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade simple-membership

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade simple-membership

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-6882?

simple membership: upgrade to newer than 4.3.8. Exact commands for each OS are on this page.

Is CVE-2023-6882 being exploited?

CVE-2023-6882 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-6882 affect?

CVE-2023-6882 affects simple membership. Severity is medium (CVSS 6.1). 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 mak

How urgent is CVE-2023-6882?

Priority 29/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

Related CVEs

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CVE-2024-1985 MEDIUM 4.7 UPGRADE The Simple Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Display Name'
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References

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