CVE-2016-9412

CRITICAL

MyBB and MyBB Merge System < 1.8.7 - Improper Access Control via Low Session ID Entropy

Title source: llm
STIX 2.1

Description

MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy.

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/94395
Mailing List, Patch, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/11/18/1
Mailing List, Patch, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/11/10/8
Patch, Release Notes, Vendor Advisory x_refsource_confirm
https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release/

Scores

CVSS v3 9.8
EPSS 0.0217
EPSS Percentile 80.0%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-284
Status published
Products (2)
mybb/merge_system < 1.8.6
mybb/mybb < 1.8.6
Published Jan 31, 2017
Tracked Since Feb 18, 2026