CVE-2016-9420

CRITICAL

Mybb Merge System < 1.8.7 - Improper Input Validation

Title source: rule

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."

References (4)

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/11/10/8

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/11/18/1

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/94396

[Patch, Release Notes, Vendor Advisory] https://blog.mybb.com/2016/10/17/mybb-1-8-8-merge-system-1-8-8-release/

Scores

CVSS v3 9.8

EPSS 0.0111

EPSS Percentile 77.8%

Attack Vector NETWORK

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

Classification

CWE

CWE-20

Status draft

Affected Products (2)

mybb/merge_system < 1.8.7

mybb/mybb < 1.8.7

Timeline

Published Jan 31, 2017

Tracked Since Feb 18, 2026