CVE-2022-31743

Name: CVE-2022-31743
Creator: NVD / NIST
Published: 2022-12-22T20:15:29.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2022-31743 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.43%

34.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 101.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1747388Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-20/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1747388Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-20/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1747388Issue Tracking, Permissions Required, Vendor Advisory

Timeline

Published: Dec 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-31743?

How severe is CVE-2022-31743?

CVE-2022-31743 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2022-31743?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-31743?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST