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This CVE has been withdrawn by MITRE
MITRE marked CVE-2026-58054 as REJECTED on . It is no longer considered a valid vulnerability record. The original content below is preserved for historical reference only.
Reason given by MITRE
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.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.
CVE-2026-58054
✕ Withdrawn — historical dataHIGHPre-NVD 7.2
7.2CVSS
- CVSS v3
- 7.2
- EchelonGraph score
- Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
- EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- —Not applicable: this CVE ID was withdrawn
Published
June 28, 2026
Last Modified
June 29, 2026
References (2)
Frequently asked(4)
What is CVE-2026-58054?
CVE-2026-58054 is a rejected CVE ID: its record was withdrawn on July 24, 2026 and no longer describes a vulnerability. Reason given: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.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.
When was the CVE record for CVE-2026-58054 published?
The CVE record for CVE-2026-58054 was published on June 28, 2026. EchelonGraph's copy of the record carries a last-modified date of June 29, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-58054?
CVE-2026-58054 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-58054?
There is nothing to remediate under CVE-2026-58054: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.