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CVE-2023-23603

MEDIUM CVSS: 6.5 Published: 2023-06-02 Modified: 2026-06-17

Description

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.

Affected Platforms

Mozilla FirefoxMozilla ThunderbirdMozilla Firefox Esr

Weakness Type

NVD-CWE-noinfo, CWE-770

References