What is CVE-2022-31743?

CVE-2022-31743 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2022-12-22.

How severe is CVE-2022-31743?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Mozilla Firefox

CVE-2022-31743

Firefox's HTML parser did not correctly interpret HTML comment tags, resulting in an incongruity with other browsers. This could have been used to escape HTML comments on pages that put user-controlled data in them. This vulnerability affects Firefox < 101.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@mozilla.org (Vendor Advisory)
security@mozilla.org (Permissions Required, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2022-31743?: CVE-2022-31743 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2022-12-22.
How severe is CVE-2022-31743?: Medium severity. CVSS v3 base score is 6.5 out of 10.