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CVE-2023-23603

Calls to console.log allowed bypassing Content Security Policy via format directive

CVSS 6.5 MEDIUMEPSS 0.6%CWE-770
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.5EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
02 Jun 2023Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products
Mozilla · FirefoxMozilla · Firefox ESRMozilla · Thunderbird

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=1800832https://www.mozilla.org/security/advisories/mfsa2023-01/https://www.mozilla.org/security/advisories/mfsa2023-02/https://www.mozilla.org/security/advisories/mfsa2023-03/