CVE-2026-47366 — 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

Back Back to CVE browser

HIGH

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

Published Jun 12, 2026

7.2

HIGH

CVSS 3.0

EPSS 0.54%

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.

Affected products

Vendor phpBB Product phpBB Default
unaffected
- Version
  3.3.0
  Status
  affected
  Constraints
  <=3.3.16

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

phpBB

unaffected

Version	Status	Constraints
3.3.0	affected	<=3.3.16

Remediation

No remediation recorded yet.

Metrics

0.54% 0.00537

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00537

Score over time

Jun–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.54% (0.00537)	43.16th	v5 (v2026.06.15)
Jun 15, 2026	0.26% (0.00263)	17.41th	v5 (v2026.06.15)
Jun 12, 2026	0.03% (0.00032)	9.83th	v4 (v2025.03.14)

Weaknesses (1)

CWE-284

References (1)

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

Link	Providers	Tags
https://www.phpbb.com/community/viewtopic.php?t=2672170

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner hackerone

Published Jun 12, 2026

Updated Jun 12, 2026

Reserved May 19, 2026

Link CVE-2026-47366

CISA Vulnrichment

Updated Jun 12, 2026

NVD

Status Deferred

Modified Jun 17, 2026

Link CVE-2026-47366

Red Hat

Severity n/a

Public date n/a

Links CVE-2026-47366