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High

Simple Membership <= 4.0.3 - Authenticated (Admin+) SQL Injections

  • Disclosed: 05.04.2021
  • Updated: 11.10.2026 10:22

The Simple Membership plugin for WordPress is vulnerable to time-based SQL Injection via the 's' and 'status' parameters in versions up to, and including, 4.0.3 due to insufficient escaping on the user-supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated Admin+ attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Affected software

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PlatformPackageVulnerable versionsFixed in
WordPress plugin Simple Membership <= 4.0.3 4.0.4

References

CVSS score 7.2/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-89
Platform
WordPress
Package
Simple Membership
Disclosed
05.04.2021
Updated
11.10.2026 10:22

Sources and licenses

Wordfence Intelligence - 1664fef3-6416-4678-9ee7-bed2184d7490 - Wordfence Intelligence

Copyright 2012-2026 Defiant Inc.

This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/
Wordfence Intelligence
Wordfence Intelligence - Defiant, Inc.
Copyright Defiant, Inc. All rights reserved except as granted below.
License grant, section 3.1 of the Wordfence Intelligence Terms and Conditions (January 26, 2026):

Subject to this Agreement, Company hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute the Service. Any copy you make for such purposes is authorized provided that you reproduce Company’s copyright designation, this license, and the license of any disclosed Company licensor in any such copy.

Full applicable Agreement: https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/

Vulnerability history: Simple Membership

All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (38) in the archive
Total entries
38
First → latest
07.2016 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 12
  • Medium 25

Disclosures per year

earlier: 2

Severity:
  1. Simple Membership <= 4.8.3 - Missing Authorization to Unauthenticated Account Takeover and Sensitive Information Disclosure via 'email' Parameter on Activation Endpoints
    High · 7.5 CVE-2026-97337 <= 4.8.3 4.8.4
  2. Simple Membership <= 4.7.7 - Unauthenticated Stored Cross-Site Scripting
    High · 7.2 CVE-2026-15931 <= 4.7.7 4.7.8
  3. Simple Membership <= 4.7.4 - Unauthenticated Stored Cross-Site Scripting
    High · 7.2 CVE-2026-11855 <= 4.7.4 4.7.5
  4. Simple Membership <= 4.7.2 - Unauthenticated Stored Cross-Site Scripting
    High · 7.2 CVE-2026-42663 <= 4.7.2 4.7.3
  5. Simple Membership <= 4.3.4 - Account Takeover via Password Reset
    High · 8.8 CVE-2023-41956 <= 4.3.4 4.3.5
  6. Simple Membership <= 4.3.4 - Privilege escalation via Registration
    High · 7.3 CVE-2023-41957 <= 4.3.4 4.3.5
  7. Simple Membership <= 4.3.5 - Reflected Cross-Site Scripting
    High · 7.2 CVE-2023-4719 <= 4.3.5 4.3.6
  8. Simple Membership <= 4.1.2 - Membership Privilege Escalation
    High · 8.8 CVE-2022-2273 <= 4.1.2 4.1.3
  9. Simple Membership <= 4.1.2 - Membership Privilege Escalation
    Critical · 9.8 CVE-2022-2317 <= 4.1.2 4.1.3
  10. Simple Membership <= 4.0.8 - Cross-Site Request Forgery to Arbitrary Member Deletion
    High · 8.8 CVE-2022-0328 < 4.0.9 4.0.9
  11. Simple Membership <= 4.0.3 - Authenticated (Admin+) SQL Injections this entry
    High · 7.2 1664fef3-6416-4678-9ee7-bed2184d7490 <= 4.0.3 4.0.4
  12. Simple Membership <= 3.8.4 - Cross-Site Request Forgery
    High · 8.8 CVE-2019-14328 < 3.8.5 3.8.5
  13. Simple Membership <= 3.3.2 - Multiple Cross-Site Request Forgery
    High · 8.8 CVE-2016-10884 <= 3.3.2 3.3.3

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