What’s Vulnerable › Vulnerabilities

CVE-2016-9420

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-01-31 · updated 2026-06-17
• Weakness: CWE-20

Description

MyBB (aka MyBulletinBoard) before 1.8.8 and MyBB Merge System before 1.8.8 allow remote attackers to have unspecified impact via vectors related to "loose comparison false positives."

Affected products

• mybb Merge System: through 1.8.7
• mybb: through 1.8.7

References

• http://www.openwall.com/lists/oss-security/2016/11/10/8
• http://www.openwall.com/lists/oss-security/2016/11/18/1
• http://www.securityfocus.com/bid/94396
• https://blog.mybb.com/2016/10/17/mybb-1-8-8-merge-system-1-8-8-release/
• http://www.openwall.com/lists/oss-security/2016/11/10/8
• http://www.openwall.com/lists/oss-security/2016/11/18/1
• http://www.securityfocus.com/bid/94396
• https://blog.mybb.com/2016/10/17/mybb-1-8-8-merge-system-1-8-8-release/

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