CVE-2010-4508

CRITICAL

The WebSockets implementation in Mozilla Firefox 4 through 4.0 Beta 7 does not properly perform proxy upgrade negotiation, which has unspecified impact and remote attack vectors, related to an "inh...

Affects 1 product across 1 vendor.

CVSS 2.010.0
EPSS1.3%
Percentile69th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2010. A critical vulnerability affects Mozilla systems (CVE-2010-4508). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2010-GLOBAL-086476-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2010-4508?
This vulnerability was disclosed in 2010. A critical vulnerability affects Mozilla systems (CVE-2010-4508). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2010-4508?
CVE-2010-4508 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 1.3%.
Is CVE-2010-4508 actively exploited?
No confirmed active exploitation of CVE-2010-4508 as of 2026-09-25.
How do I remediate CVE-2010-4508?
Priority: MEDIUM.
What systems are affected by CVE-2010-4508?
CVE-2010-4508 affects Mozilla Firefox.
Vulnerability Details
CVE IDCVE-2010-4508
BSIDBS-2010-GLOBAL-086476-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2010-12-09
Last Modified2026-06-16
ICS Relevance0%
SourceNVD
Official Description

The WebSockets implementation in Mozilla Firefox 4 through 4.0 Beta 7 does not properly perform proxy upgrade negotiation, which has unspecified impact and remote attack vectors, related to an "inherent problem" with the WebSocket specification.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The WebSockets implementation in Mozilla Firefox 4 through 4.0 Beta 7 does not properly perform proxy upgrade negotiation, which has unspecified impact and remote attack vectors, related to an "inherent problem" with the WebSocket specification. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Mozilla Firefox 4.0
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 5789 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 Hashb3900eabf59a0f227d0eecb8510698d502bfab665b42ec42c5cda3138853b25aea2129051de3fe32db31513d73d7dbe1b2cf57da1a801e7cf14867965f58b20f
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