CVE-2015-8973

HIGH 8.3CVE-2015-8973 · Published 31/01/2017 · updated 17/06/2026

In short

CVE-2015-8973 is a HIGH (CVSS 8.3) vulnerability affecting merge system (mybb), mybb (mybb).
Chance of exploitation in the next 30 days (EPSS): 1.6%, higher than 76.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
merge system mybb	`≤ 1.8.5`	No fix yet
mybb mybb	`= 1.8.0= 1.8.1= 1.8.2= 1.8.3= 1.8.4= 1.8.5≤ 1.6.17`	No fix yet

Description

xmlhttp.php in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to bypass intended access restrictions via vectors related to the forum password.

References

openwall.com/lists/oss-security/2016/11/10/8 · Third Party Advisory
openwall.com/lists/oss-security/2016/11/18/1 · Mailing List
securityfocus.com/bid/94397 · Third Party Advisory
blog.mybb.com/2015/09/07/mybb-1-8-6-1-6-18-merge-system-1-8-6-release · Release Notes

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Package

Affected versions

Patched versions

merge system

mybb

≤ 1.8.5

No fix yet

mybb

= 1.8.0= 1.8.1= 1.8.2= 1.8.3= 1.8.4= 1.8.5≤ 1.6.17

No fix yet

More vulnerabilities in merge system

See all →