CVE-2022-45403

Name: CVE-2022-45403
Creator: NVD / NIST
Published: 2022-12-22T20:15:41.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2022-45403 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Service Workers should not be able to infer information about opaque cross-origin responses; but timing information for cross-origin media combined with Range requests might have allowed them to determine the presence or length of a media file. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

Service Workers should not be able to infer information about opaque cross-origin responses; but timing information for cross-origin media combined with Range requests might have allowed them to determine the presence or length of a media file. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.70%

48.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 107.0
Mozilla	Firefox Esr	< 102.5
Mozilla	Thunderbird	< 102.5

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1762078Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2022-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-48/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-49/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1762078Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2022-47/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-48/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-49/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2022-45403?

How severe is CVE-2022-45403?

CVE-2022-45403 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2022-45403?

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-2022-45403?

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

Scan your code now

Source: NVD / NIST