CVE-2016-9403

Name: CVE-2016-9403
Creator: NVD / NIST
Published: 2017-01-31T22:59:01.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.56%

Last modified Jun 17, 2026

CVE-2016-9403 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.56% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.56%

83.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Mybb	Merge System	<= 1.8.6
Mybb	Mybb	<= 1.8.6

References

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

Timeline

Published: Jan 31, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9403?

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.

How severe is CVE-2016-9403?

Severity scoring for CVE-2016-9403 is pending analysis. The EPSS model estimates a 2.56% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9403?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9403?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST