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

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Summary

CVECVE-2023-6882
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-01-11 09:15:53 UTC
Updated2026-04-08 18:18:44 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

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

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Simple-membership-plugin Simple Membership All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpinsider-1 Simple Membership affected 4.3.8 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/366165fe-93e5-49ab-b2e5-1de62... af854a3a-2127-422b-91ae-364da2661108 www.wordfence.com Third Party Advisory
plugins.trac.wordpress.org/changeset/3010737/simple-membership af854a3a-2127-422b-91ae-364da2661108 plugins.trac.wordpress.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Rein Daelman (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-12-16T00:00:00.000ZVendor Notified
CNA2023-12-18T00:00:00.000ZDisclosed
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