Privilege Escalation in Membership & User Roles for WooCommerce (WordPress plugin) (CVE-2026-104767)
Summary
Vulnerability in Membership & User Roles for WooCommerce (WordPress plugin) (CVE-2026-104767). Successful exploitation can lead to full system takeover. Exploitable via dfxwcrc_foreign_roles.
Original description
The description as published by the source.
The Membership & User Roles for WooCommerce (Automatic Role Changer) plugin for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 20260828. This is due to the maybe_add_role_to_user() function unconditionally re-assigning every role stored in the dfxwcrc_foreign_roles user meta cache without verifying that each cached role is still actively assigned by the external provider — a condition made permanent by remember_foreign_roles(), which merges new foreign roles into the cache but never evicts roles that have since been revoked. This makes it possible for authenticated attackers with subscriber-level access and above to restore a previously revoked Administrator role to their own account, gaining full administrative control of the site, by triggering any role-assignment event such as completing a purchase for a role-mapped product. Exploitation requires Replace Roles mode to be enabled and the attacker's account to have previously received Administrator legitimately through a separate role-management mechanism while the plugin was active, so that administrator was written into the dfxwcrc_foreign_roles user meta cache before the external provider revoked it.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-104767 has been found in Membership & User Roles for WooCommerce (WordPress plugin).
Attackers can target a specific entry point like dfxwcrc_foreign_roles over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 7.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Membership & User Roles for WooCommerce (WordPress plugin) CVE-2026-104767" on the vendor's site.
CVE-2026-104767 (Membership & User Roles for WooCommerce (WordPress plugin)) — CWE-269 / CVSS v3 7.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: dfxwcrc_foreign_roles / administrator
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-269) exists in Membership & User Roles for WooCommerce (WordPress plugin). Attackers reach the vulnerable code path via dfxwcrc_foreign_roles.
Check the vendor advisory for the affected versions of Membership & User Roles for WooCommerce (WordPress plugin). Attack surface: dfxwcrc_foreign_roles / administrator.
Severity: High (CVSS 7.5/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Membership & User Roles for WooCommerce (WordPress plugin) を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web nvd.nist.gov
- web github.com