What is CVE-2023-5723?

CVE-2023-5723 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 5.3/10. Published 2023-10-25.

How severe is CVE-2023-5723?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Mozilla Firefox

CVE-2023-5723

An attacker with temporary script access to a site could have set a cookie containing invalid characters using `document.cookie` that could have led to unknown errors. This vulnerability affects Firefox < 119.

EPSS: 0.007 (49.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Mozilla Firefox — versions unspecified

References

security@mozilla.org (Issue Tracking)
security@mozilla.org (Vendor Advisory)
security@mozilla.org

Frequently asked questions

What is CVE-2023-5723?: CVE-2023-5723 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 5.3/10. Published 2023-10-25.
How severe is CVE-2023-5723?: Medium severity. CVSS v3 base score is 5.3 out of 10.