Security readout for executives and security teams
Plain-English summary
A vulnerable WCFM Membership plugin can let an unauthenticated visitor turn normal registration into administrator registration. For an exposed WordPress site, this can mean full site takeover without needing a password or user account.
Executive priority
Treat as urgent for any internet-facing WordPress marketplace site. The business risk is full administrative compromise, including content tampering, data exposure, malware placement, and service disruption.
Technical view
CVE-2022-4939 is a missing authorization check in WCFM Membership up to and including 2.10.0. The unauthenticated AJAX action wp_ajax_nopriv_wcfm_ajax_controller controls membership settings, allowing membership registration form changes that can permit administrator-role registration.
Likely exposure
Public WordPress sites using WCFM Membership version 2.10.0 or earlier are the relevant exposure, especially sites with marketplace or membership registration enabled.
Exploitation context
The source bundle does not state active exploitation, and KEV is false. The CVSS 9.8 rating reflects remote, unauthenticated, low-complexity exploitation with high confidentiality, integrity, and availability impact.
Researcher notes
Evidence supports CWE-862 missing authorization on an unauthenticated WordPress AJAX controller. The bundle names the vulnerable range but does not provide confirmed exploitation telemetry or a specific fixed version number.
Mitigation direction
- Identify sites running WCFM Membership and record installed versions.
- Upgrade to vendor guidance or a fixed release newer than 2.10.0 if available.
- Disable the plugin temporarily if no fixed release can be confirmed.
- Review administrator accounts created around suspected exposure windows.
- Restrict or disable public registration where business operations allow.
Validation and detection
- Check WordPress plugin inventory for WCFM Membership versions up to 2.10.0.
- Review role and registration settings for unexpected administrator registration behavior.
- Audit recent administrator account creation and privilege changes.
- Confirm the unauthenticated AJAX surface is no longer present after remediation.
- Verify monitoring covers new administrator creation and plugin setting changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-4939 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0870de2d-bca5-4d57-a07f-877a416ce0d5?source=cveCVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2633191%40wc-multivendor-membership&new=2633191%40wc-multivendor-membership&sfp_email=&sfph_mail=CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.