CVE-2022-22757

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-22 · updated 2026-06-17
Weakness: CWE-346

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.

Affected products

Mozilla Firefox: before 97.0 — fixed in 97.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 97.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1720098
https://www.mozilla.org/security/advisories/mfsa2022-04/
https://bugzilla.mozilla.org/show_bug.cgi?id=1720098
https://www.mozilla.org/security/advisories/mfsa2022-04/

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