Rejected privilege-escalation report on intended permissions
Published Jun 28, 2026 · Updated Jun 28, 2026
The CVE record rejects the reported privilege escalation in MyBB 1.8.40 because the behavior is documented product design. The report concerned the Users & Groups permission, which intentionally lets a trusted ACP administrator with user-management access assign administrative groups. MyBB documentation explicitly identifies user-management permission as allowing privilege escalation, so MITRE determined that no security vulnerability exists.
Summary
What happened
The CVE record rejects the reported privilege escalation in MyBB 1.8.40 because the behavior is documented product design. The report concerned the Users & Groups permission, which intentionally lets a trusted ACP administrator with user-management access assign administrative groups. MyBB documentation explicitly identifies user-management permission as allowing privilege escalation, so MITRE determined that no security vulnerability exists.
The record
- CVE
- CVE-2026-58054
- Published
- Jun 28, 2026
- Updated
- Jun 28, 2026
- Vendor
- MyBB
- Product
- MyBB
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Jun 28, 2026CVE publishedPublication date reported by the CVE source.
- Jun 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.8.40
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
- MyBB Limited ACP User Manager to Full Administrator PoCfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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