CVE-2016-9403

CRITICAL

MyBB <1.8.7 - Info Disclosure

Title source: llm

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.

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/94395

[Patch, Release Notes, Vendor Advisory] https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release/

Scores

CVSS v3 9.8

EPSS 0.0533

EPSS Percentile 89.9%

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-264

Status draft

Affected Products (2)

mybb/merge_system < 1.8.6

mybb/mybb < 1.8.6

Timeline

Published Jan 31, 2017

Tracked Since Feb 18, 2026