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CVE-2016-9415

23
FAUCET Score

CVE-2016-9415 describes a vulnerability in MyBB (MyBulletinBoard) and MyBB Merge System versions prior to 1.8.8 when running on Windows, allowing remote attackers to overwrite arbitrary CSS files through "style import" vectors. This vulnerability carries a CVSSv3 score of 7.5 (HIGH), indicating a network-based attack with low complexity and high impact on integrity, requiring no user interaction or privileges. While the FAUCET Risk Score is 53/100, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.7CPE matchmatch criteria
cpe:2.3:a:mybb:merge_system:*:*:*:*:*:*:*:*
<= 1.8.7CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.86%
Probability of exploitation in next 30 days
EPSS Percentile
77.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0186 is in the 60th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.mybb.com / 2016/10/17/mybb-1-8-8-merge-system-1-8-8-release
PatchRelease NotesVendor Advisory
openwall.com / lists/oss-security/2016/11/10/8
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2016/11/18/1
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/94396
Third Party AdvisoryVDB Entry