CVE-2023-23604

6.5 mediumEPSS 0.5%

Medium (6.5) in mozilla firefox. EPSS 0.5% chance of exploitation in the next 30 days.

A duplicate `SystemPrincipal` object could be created when parsing a non-system html document via `DOMParser::ParseFromSafeString`. This could have lead to bypassing web security checks. This vulnerability affects Firefox < 109.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2023-06-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1802346
https://www.mozilla.org/security/advisories/mfsa2023-01/
https://bugzilla.mozilla.org/show_bug.cgi?id=1802346
https://www.mozilla.org/security/advisories/mfsa2023-01/

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