CVE-2016-9403

CRITICAL 9.8CVE-2016-9403 · Published 31/01/2017 · updated 17/06/2026

In short

CVE-2016-9403 is a CRITICAL (CVSS 9.8) vulnerability affecting merge system (mybb), mybb (mybb).
Chance of exploitation in the next 30 days (EPSS): 2.6%, higher than 85.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
merge system mybb	`≤ 1.8.6`	No fix yet
mybb mybb	`≤ 1.8.6`	No fix yet

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

openwall.com/lists/oss-security/2016/11/10/8 · Mailing List
openwall.com/lists/oss-security/2016/11/18/1 · Mailing List
securityfocus.com/bid/94395 · Third Party Advisory
blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release · Patch

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Package

Affected versions

Patched versions

merge system

mybb

≤ 1.8.6

No fix yet

mybb

≤ 1.8.6

No fix yet

More vulnerabilities in merge system

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