CVE-2011-5133

CRITICAL

Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list."

Affects 1 product across 1 vendor.

CVSS 2.010.0
EPSS1.7%
Percentile77th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2012. A critical vulnerability affects Mybb systems (CVE-2011-5133). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2012-GLOBAL-089199-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2011-5133?
This vulnerability was disclosed in 2012. A critical vulnerability affects Mybb systems (CVE-2011-5133). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2011-5133?
CVE-2011-5133 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 1.7%.
Is CVE-2011-5133 actively exploited?
No confirmed active exploitation of CVE-2011-5133 as of 2026-09-25.
How do I remediate CVE-2011-5133?
Priority: MEDIUM. Advisory: http://blog.mybb.com/2011/11/25/mybb-1-6-5-released-feature-update-security-maintenance-release/ PSIRT: [email protected]
What systems are affected by CVE-2011-5133?
CVE-2011-5133 affects Mybb Mybb.
Vulnerability Details
CVE IDCVE-2011-5133
BSIDBS-2012-GLOBAL-089199-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2012-08-30
Last Modified2026-06-16
ICS Relevance0%
SourceNVD
Official Description

Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list."

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Unspecified vulnerability in MyBB before 1.6.5 has unknown impact and attack vectors, related to an "unparsed user avatar in the buddy list." CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Mybb Mybb ≤ 1.6.4
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 5159 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 Hashcff205de1ba2c0b2526884c5b15bc44f30eff0f5fa1a17297c23e5f721c6700944c5d88f2bc06f98734e138f8b8cb39fec1677e83bcaaf9b2e876a2ee477ad08
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