CVE-2016-9402

CRITICAL

SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to execute arbitrary SQL commands via u...

Affects 2 products across 1 vendor.

CVSS 3.09.8
EPSS2.1%
Percentile81th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-89: SQL Injection

Attacker inserts SQL commands into application queries through user-controlled input, allowing unauthorized database access.

Related Attack Patterns (CAPEC)
CAPEC-7 Blind SQL Injection
via CWE-89
CAPEC-108 Command Line Execution through SQL Injection
via CWE-89
CAPEC-109 Object Relational Mapping Injection
via CWE-89
CAPEC-110 SQL Injection through SOAP Parameter Tampering
via CWE-89
CAPEC-470 Expanding Control over the Operating System from the Database
via CWE-89
Show all 6
via CWE-89

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2017. A critical vulnerability affects Mybb systems (CVE-2016-9402). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2017-GLOBAL-113007-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2016-9402?
This vulnerability was disclosed in 2017. A critical vulnerability affects Mybb systems (CVE-2016-9402). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2016-9402?
CVE-2016-9402 has CVSS 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 2.1%.
Is CVE-2016-9402 actively exploited?
No confirmed active exploitation of CVE-2016-9402 as of 2026-09-25.
How do I remediate CVE-2016-9402?
Priority: MEDIUM. Advisory: https://blog.mybb.com/2016/03/11/mybb-1-8-7-merge-system-1-8-7-release/ PSIRT: [email protected]
What systems are affected by CVE-2016-9402?
CVE-2016-9402 affects Mybb Mybb, Merge System.
Vulnerability Details
CVE IDCVE-2016-9402
BSIDBS-2017-GLOBAL-113007-C BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2017-01-31
Last Modified2026-06-17
ICS Relevance0%
Weakness (CWE)
SQL Injection
SourceNVD
Official Description

SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to execute arbitrary SQL commands via unspecified vectors.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 might allow remote attackers to execute arbitrary SQL commands via unspecified vectors. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Mybb Mybb ≤ 1.8.6
Mybb Merge System ≤ 1.8.6
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3544 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash47bb445513de97e7deeed3d246ce739395dd262d41a2289d76526c4269c93f11827182b8a2ad983e515e28db319da15ad45705ec488a19d50409b7b57c181a05
Related CVEs affecting Mybb
CVE-2015-2786 10.0 Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unkn... CVE-2015-8974 10.0 SQL injection vulnerability in the Group Promotions module in the admin contr... CVE-2006-0218 10.0 Multiple unspecified vulnerabilities in MyBulletinBoard (MyBB) before 1.0.2 h... CVE-2011-5133 10.0 Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack ... CVE-2016-9403 9.8 newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System...
View all Mybb CVEs →

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