Simple Membership <= 4.3.5 - Reflected Cross-Site Scripting

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Summary

CVECVE-2023-4719
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-09-06 02:15:09 UTC
Updated2026-04-08 19:18:34 UTC
DescriptionThe Simple Membership plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `list_type` parameter in versions up to, and including, 4.3.5 due to insufficient input sanitization and output escaping. Using this vulnerability, unauthenticated attackers could inject arbitrary web scripts into pages that are being executed if they can successfully trick a user into taking an action, such as clicking a malicious 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

EPSS: 0.014170000 probability, percentile 0.805720000 (date 2026-04-09)

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]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 4.3.5 semver Not specified

References

ReferenceSourceLinkTags
403 Forbidden af854a3a-2127-422b-91ae-364da2661108 plugins.trac.wordpress.org Patch
Simple Membership <= 4.3.5 - Reflected Cross-Site Scripting af854a3a-2127-422b-91ae-364da2661108 www.wordfence.com Third Party Advisory
Simple Membership – WordPress plugin | WordPress.org af854a3a-2127-422b-91ae-364da2661108 wordpress.org Product
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: Vladislav Pokrovsky (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-09-05T00:00:00.000ZDisclosed
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