CVE-2015-8976

MEDIUM

Mybb Merge System < 1.6.17 - XSS

Title source: rule

Description

Cross-site scripting (XSS) vulnerability in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 might allow remote attackers to inject arbitrary web script or HTML via vectors related to "old upgrade files."

References (4)

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

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

[Release Notes, Vendor Advisory] https://blog.mybb.com/2015/09/07/mybb-1-8-6-1-6-18-merge-system-1-8-6-release/

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/94397

Scores

CVSS v3 6.1

EPSS 0.0032

EPSS Percentile 54.4%

Attack Vector NETWORK

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

Classification

CWE

CWE-79

Status published

Affected Products (9)

mybb/merge_system

mybb/mybb < 1.6.17

mybb/mybb

mybb/mybb

mybb/mybb

mybb/mybb

mybb/mybb

mybb/mybb

n/a/n/a

Timeline

Published Jan 31, 2017

Tracked Since Feb 18, 2026