Security readout for executives and security teams
CVE-2015-8973 is an access-control bypass in MyBB forum software. Older MyBB and MyBB Merge System versions could let a remote attacker bypass forum password restrictions, risking exposure of protected forum content. The sources do not provide CVSS scoring or confirm active exploitation. Exposure is most likely on internet-facing MyBB forums running affected versions, especially sites using password-protected forums or the MyBB Merge System. Systems already updated to MyBB 1.6.18, 1.8.6, Merge System 1.8.6, or later are likely outside the described affected range. Treat as a cleanup priority for any legacy MyBB forum. It is not supported by current active-exploitation evidence in the provided sources, but it affects confidentiality controls and should be remediated wherever old MyBB versions remain online. Mitigation focus: Upgrade MyBB to 1.6.18, 1.8.6, or a later supported release.; Upgrade MyBB Merge System to 1.8.6 or later if installed.; Review vendor release notes and apply any related security guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2015-8973 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.mybb.com/2015/09/07/mybb-1-8-6-1-6-18-merge-system-1-8-6-release/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.