Security readout for executives and security teams
This issue affects older MyBB forum software and MyBB Merge System versions before 1.8.7. It is a cross-site scripting flaw in member validation that could let a remote attacker inject script or HTML. The public record does not specify the exact vector, severity score, or confirmed exploitation. Exposure is most likely on public or user-accessible MyBB forums, or installations using MyBB Merge System, running versions earlier than 1.8.7. Evidence is incomplete for exact configurations, plugins, or request paths. Prioritize remediation for internet-facing forums or forums handling staff, customer, or community accounts. This is not currently evidenced as exploited, but XSS can support account compromise and trust abuse in public web applications. Mitigation focus: Upgrade MyBB to 1.8.7 or a later vendor-supported release.; Upgrade MyBB Merge System to 1.8.7 or later if installed.; Review MyBB release guidance for any version-specific remediation notes..
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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CVE-2016-9405 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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/2016/03/11/mybb-1-8-7-merge-system-1-8-7-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.