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WCFM Membership <= 2.10.0 — Unauthenticated Privilege Escalation

CVE-2022-4939Published · Updated

Action summary

Affected: ≤2.10.0Update to 2.10.1 or newer

All remediation steps
Watch plugin
Severity
Critical9.8
CVSS
9.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-862 Missing Authorization
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

WCFM Membership – WooCommerce Memberships for Multivendor Marketplace wc-multivendor-membership

  1. Affected≤ 2.10.0
  2. Patched in2.10.1

Update to 2.10.1 or newer.

You are affected if you run ≤ 2.10.0. Version 2.10.1 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WCFM Membership – WooCommerce Memberships for Multivendor Marketplace.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 2.10.1, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch WCFM Membership – WooCommerce Memberships for Multivendor Marketplace to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Chloe Chamberland.

THe WCFM Membership plugin for WordPress is vulnerable to privilege escalation in versions up to, and including 2.10.0, due to a missing capability check on the wp_ajax_nopriv_wcfm_ajax_controller AJAX action that controls membership settings. This makes it possible for unauthenticated attackers to modify the membership registration form in a way that allows them to set the role for registration to that of any user including administrators. Once configured, the attacker can then register as an administrator.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in WCFM Membership – WooCommerce Memberships for Multivendor Marketplace

All 14
More vulnerabilities in WCFM Membership – WooCommerce Memberships for Multivendor Marketplace
SeverityVulnerabilityCVEPublished
Medium4.3Missing Authorization
≤2.12.0Update to 2.12.1
CVE-2026-61990
High7.2Unauthenticated Stored Cross-Site Scripting
≤2.12.0Update to 2.12.1
CVE-2026-39744
Medium6.3Authenticated (Subscriber+) Privilege Escalation
≤2.12.0Update to 2.12.1
CVE-2026-12967
Medium5.3Missing Authorization
≤2.12.0Update to 2.12.1
CVE-2026-39743
Medium4.3Missing Authorization
≤2.12.0Update to 2.12.1
CVE-2026-39777

Same weakness (Missing Authorization)

All Missing Authorization
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SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity critical, CVSS 9.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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