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Vulnerabilities/CVE-2023-37208Public Intelligence Dossier
Source: mozilla · Limited verification•Last verified: •Collection Healthy
CVE-2023-37208Unknown / EvaluatingHIGH (raw)CVSS 7.8NVD-CWE-noinfo

When opening Diagcab files, Firefox did not warn the user that these files may contain malicious code

Published: 05 Jul 2023•Last updated: 24 Oct 2026, 06:40 PM IST•Source identifier: security@mozilla.org
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.8HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Metric sourcenvd@nist.gov
EPSS probability
0.2%0.002
Percentile14th
Weakness type
NVD-CWE-noinfo
CWE-434
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

When opening Diagcab files, Firefox did not warn the user that these files may contain malicious code. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.

SOC priority

High

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; Source severity; no confirmed exploitation signal

Affected Products & Remediation

4 source-backed products
Affected products and versions (source)
  • mozilla firefox · < 115.0; esr < 102.13 · NVD CPE · Source
  • mozilla firefox esr · < 102.13 · NVD CPE · Source
  • mozilla thunderbird · < 102.13 · NVD CPE · Source
  • debian debian linux · 10.0; 11.0; 12.0 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched file-upload (CWE-434)

Exposure

  1. Identify the affected upload feature and deployed product version.Telemetry: Application inventory · The CWE does not identify a specific local upload path. · Rule file-upload

Exploitation evidence

  1. Review uploads and subsequent access to newly created executable or script files.Telemetry: Application access logs · A suspicious upload followed by execution may warrant investigation. · Rule file-upload

Response

  1. Confirm the vendor fix and validate upload restrictions.Telemetry: Application change records · Configuration and version checks verify the local response. · Rule file-upload

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
security@mozilla.org
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*, cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*, cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

Evidence & Provenance

3 public sources
mozilla.orgSource recordnvd.nist.govSource recordbugzilla.mozilla.orgSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2023-37208
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2023-37208
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2023-37208"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.