CVE-2015-2786

CRITICAL

Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications sent to wrong group leaders."

Affects 1 product across 1 vendor.

CVSS 2.010.0
EPSS1.4%
Percentile71th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2015. A critical vulnerability affects Mybb systems (CVE-2015-2786). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2015-GLOBAL-263124-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2015-2786?
This vulnerability was disclosed in 2015. A critical vulnerability affects Mybb systems (CVE-2015-2786). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2015-2786?
CVE-2015-2786 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 1.4%.
Is CVE-2015-2786 actively exploited?
No confirmed active exploitation of CVE-2015-2786 as of 2026-09-25.
How do I remediate CVE-2015-2786?
Priority: MEDIUM. Advisory: http://blog.mybb.com/2015/02/15/mybb-1-8-4-released-feature-update-security-maintenance-release/ PSIRT: [email protected]
What systems are affected by CVE-2015-2786?
CVE-2015-2786 affects Mybb Mybb.
Vulnerability Details
CVE IDCVE-2015-2786
BSIDBS-2015-GLOBAL-263124-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2015-03-29
Last Modified2026-06-17
ICS Relevance0%
SourceNVD
Official Description

Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications sent to wrong group leaders."

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Unspecified vulnerability in MyBB (aka MyBulletinBoard) before 1.8.4 has unknown attack vectors related to "Group join request notifications sent to wrong group leaders." CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Mybb Mybb ≤ 1.8.3
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 4218 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 Hashf8b5a0ef0afdb706cabd3758b5d31066ff02dc6b77c357a7916b2c4b6decf2dc9254d4262f9779f9fafc38e589797e2ecc0d8fde8ac2d746a294d512d020e726
Related CVEs affecting Mybb
CVE-2011-5133 10.0 Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack ... 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-2016-9402 9.8 SQL injection vulnerability in the moderation tool in MyBB (aka MyBulletinBoa... CVE-2016-9403 9.8 newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System...
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