MultiVendorX through 5.0.19 Incorrect Authorization via Settings REST Endpoint

Advisories

MultiVendorX through 5.0.19 Incorrect Authorization via Settings REST Endpoint

severity: high
date: 10/10/2026
Affecting: MultiVendorX <= 5.0.19
CVE: CVE-2026-108695
CWE: CWE-863 Incorrect Authorization
CVSS: 7.1
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
References: GitHub Issue #2375
https://github.com/multivendorx/multivendorx
https://github.com/multivendorx/multivendorx/blob/8a717799b02f698e4b2b61a282062a41fbe15183/plugins/multivendorx/classes/RestAPI/Controllers/Settings.php#L77-L80
https://github.com/multivendorx/multivendorx/blob/8a717799b02f698e4b2b61a282062a41fbe15183/plugins/multivendorx/classes/RestAPI/Controllers/Settings.php#L157-L172
https://wordpress.org/plugins/dc-woocommerce-multi-vendor/
Credit: George Chen
Description: MultiVendorX WordPress plugin through 5.0.19 contains an incorrect authorization vulnerability that allows vendor accounts to modify marketplace-wide settings via the settings REST endpoint. Attackers with the store_owner role can send POST requests to /wp-json/multivendorx/v1/settings, gated only by edit_stores, to overwrite commission, payout, and onboarding settings.

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