CVE-2016-9403

9.8 CRITICAL

Published: January 31, 2017 Modified: May 13, 2026

Description

newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allows remote attackers to have unspecified impact by leveraging a missing permission check.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/11/10/8

Source: cve@mitre.org

Mailing List Patch Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/11/18/1

Source: cve@mitre.org

Mailing List Patch Third Party Advisory

http://www.securityfocus.com/bid/94395

Source: cve@mitre.org

Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Patch Release Notes Vendor Advisory

http://www.openwall.com/lists/oss-security/2016/11/10/8

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Patch Third Party Advisory

http://www.openwall.com/lists/oss-security/2016/11/18/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Patch Third Party Advisory

http://www.securityfocus.com/bid/94395

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

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

Source: af854a3a-2127-422b-91ae-364da2661108

Patch Release Notes Vendor Advisory

8 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

2.6%

83th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-264

Affected Vendors

mybb

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