CVE-2022-22757

Name: CVE-2022-22757
Creator: NVD / NIST
Published: 2022-12-22T20:15:18.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2022-22757 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Remote Agent, used in WebDriver, did not validate the Host or Origin headers. This could have allowed websites to connect back locally to the user's browser to control it. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

Remote Agent, used in WebDriver, did not validate the Host or Origin headers. This could have allowed websites to connect back locally to the user's browser to control it. <br>*This bug only affected Firefox when WebDriver was enabled, which is not the default configuration.*. This vulnerability affects Firefox < 97.

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

0.23%

14.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 97.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1720098Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-04/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1720098Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-04/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2022-22757?

How severe is CVE-2022-22757?

CVE-2022-22757 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2022-22757?

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-2022-22757?

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

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Source: NVD / NIST