Home/CVE/A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src head
CVE

CVE-2023-23602

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src head

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

MEDIUM · CVSS 6.5 EPSS 0.00142
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

3
mozilla firefox< 109.0
mozilla firefox esr< 102.7
mozilla thunderbird< 102.7
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Jun 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

27
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:12623-1
suse-csafopenSUSE-SU-2024:12627-1
suse-csafopenSUSE-SU-2024:12652-1
suse-csafSUSE-SU-2023:0329-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1800890Issue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-01/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-02/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-03/Vendor Advisory
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