What’s Vulnerable › Vulnerabilities

CVE-2016-9405

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% 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-79

Description

Cross-site scripting (XSS) vulnerability in member validation in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Affected products

• mybb Merge System: through 1.8.6
• mybb: through 1.8.6

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/94395
• https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-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/94395
• https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release/

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