CVE-2022-45418

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% 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-1021

Description

If a custom mouse cursor is specified in CSS, under certain circumstances the cursor could have been drawn over the browser UI, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Affected products

Mozilla Firefox: before 107.0 — fixed in 107.0
Mozilla Firefox ESR: before 102.5 — fixed in 102.5
Mozilla Thunderbird: before 102.5 — fixed in 102.5

How to fix

Upgrade to a fixed version: Mozilla Firefox 107.0; Mozilla Firefox ESR 102.5; Mozilla Thunderbird 102.5. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1795815
https://www.mozilla.org/security/advisories/mfsa2022-47/
https://www.mozilla.org/security/advisories/mfsa2022-48/
https://www.mozilla.org/security/advisories/mfsa2022-49/
https://bugzilla.mozilla.org/show_bug.cgi?id=1795815
https://www.mozilla.org/security/advisories/mfsa2022-47/
https://www.mozilla.org/security/advisories/mfsa2022-48/
https://www.mozilla.org/security/advisories/mfsa2022-49/
https://bugzilla.mozilla.org/show_bug.cgi?id=1795815

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