Description
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. This CVE was assigned on the basis that the permission system allows a limited administrator to grant privileges exceeding their own authorization scope, potentially constituting an insecure default configuration. Following a dispute, the MITRE TL-Root determined the behavior reflects documented and intended product design rather than a security vulnerability.
Published: 2026-06-28
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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References

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History

Fri, 24 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Title MyBB - Privilege Escalation from Limited ACP User Management to Administrator
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 24 Jul 2026 19:15:00 +0000

Type Values Removed Values Added
Description MyBB 1.8.40 does not restrict which usergroup a limited Admin Control Panel user may assign when creating or editing users; the user module offers the Administrators group (gid 4) and its datahandler's verify_usergroup() unconditionally returns true. An admin holding only the delegated user-management permission can assign the Administrators group to an account and escalate to the full Administrator permission set. This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. This CVE was assigned on the basis that the permission system allows a limited administrator to grant privileges exceeding their own authorization scope, potentially constituting an insecure default configuration. Following a dispute, the MITRE TL-Root determined the behavior reflects documented and intended product design rather than a security vulnerability.
Weaknesses CWE-269
CPEs cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Mon, 29 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sun, 28 Jun 2026 02:15:00 +0000

Type Values Removed Values Added
Description MyBB 1.8.40 does not restrict which usergroup a limited Admin Control Panel user may assign when creating or editing users; the user module offers the Administrators group (gid 4) and its datahandler's verify_usergroup() unconditionally returns true. An admin holding only the delegated user-management permission can assign the Administrators group to an account and escalate to the full Administrator permission set.
Title MyBB - Privilege Escalation from Limited ACP User Management to Administrator
First Time appeared Mybb
Mybb mybb
Weaknesses CWE-269
CPEs cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
Vendors & Products Mybb
Mybb mybb
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Mybb Mybb
cve-icon MITRE

Status: REJECTED

Assigner: VulnCheck

Published:

Updated: 2026-07-24T18:41:35.208Z

Reserved: 2026-06-28T00:55:25.426Z

Link: CVE-2026-58054

cve-icon Vulnrichment

Updated:

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-28T08:45:06Z

Weaknesses

No weakness.