CVE-2022-42927

Name: CVE-2022-42927
Creator: NVD / NIST
Published: 2022-12-22T20:15:40.127+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2022-42927 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A same-origin policy violation could have allowed the theft of cross-origin URL entries, leaking the result of a redirect, via `performance.getEntries()`. This vulnerability affects Firefox < 106, Firefox ESR < 102.4, and Thunderbird < 102.4.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

A same-origin policy violation could have allowed the theft of cross-origin URL entries, leaking the result of a redirect, via `performance.getEntries()`. This vulnerability affects Firefox < 106, Firefox ESR < 102.4, and Thunderbird < 102.4.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.41%

33.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 106.0
Mozilla	Firefox Esr	< 102.4
Mozilla	Thunderbird	< 102.4

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1789128Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2022-44/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-46/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1789128Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2022-44/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-46/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1789128Issue Tracking, Permissions Required

Timeline

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

Frequently Asked Questions

What is CVE-2022-42927?

How severe is CVE-2022-42927?

CVE-2022-42927 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2022-42927?

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-2022-42927?

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

Scan your code now

Source: NVD / NIST