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CVE-2017-16780

43
FAUCET Score

CVE-2017-16780 is a critical remote code execution (RCE) vulnerability affecting MyBB versions prior to 1.8.13, where an attacker can write to the configuration file during installation. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction or authentication, and can lead to complete compromise of confidentiality, integrity, and availability. While not currently on CISA's KEV catalog, public exploit code exists (EDB-43136), though there is minimal community discussion or media coverage surrounding this specific CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.12CPE matchmatch criteria
cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.77%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-43136 · Nov 11, 2017
This CVE's current EPSS score of 0.0577 is in the 87th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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 / 2017/11/07/mybb-1-8-13-released-security-maintenance-release
Release NotesVendor Advisory
exploit-db.com / exploits/43136
ExploitThird Party AdvisoryVDB Entry