Regular expressions used to filter out forbidden properties and values from style directives in calls to `console.log` weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3275-1 firefox-esr security update
Debian DLA Debian DLA DLA-3324-1 thunderbird security update
Debian DSA Debian DSA DSA-5322-1 firefox-esr security update
Debian DSA Debian DSA DSA-5355-1 thunderbird security update
EUVD EUVD EUVD-2023-27703 Regular expressions used to filter out forbidden properties and values from style directives in calls to <code>console.log</code> weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox < 109, Thunderbird < 102.7, and Firefox ESR < 102.7.
Ubuntu USN Ubuntu USN USN-5816-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-5824-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 18 Dec 2025 15:30:00 +0000

Type Values Removed Values Added
Description Regular expressions used to filter out forbidden properties and values from style directives in calls to <code>console.log</code> weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox < 109, Thunderbird < 102.7, and Firefox ESR < 102.7. Regular expressions used to filter out forbidden properties and values from style directives in calls to `console.log` weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.
Title Mozilla: Calls to <code>console.log</code> allowed bypasing Content Security Policy via format directive Calls to console.log allowed bypassing Content Security Policy via format directive

Fri, 10 Jan 2025 18:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2025-12-18T15:22:57.414Z

Reserved: 2023-01-16T00:00:00

Link: CVE-2023-23603

cve-icon Vulnrichment

Updated: 2024-08-02T10:35:33.580Z

cve-icon NVD

Status : Modified

Published: 2023-06-02T17:15:10.823

Modified: 2025-12-18T16:15:48.920

Link: CVE-2023-23603

cve-icon Redhat

Severity : Low

Publid Date: 2023-01-17T00:00:00Z

Links: CVE-2023-23603 - Bugzilla

cve-icon OpenCVE Enrichment

No data.