CVE-2025-1018

5.3 MEDIUM 0.4% exploit odds Fix listed Other Browser & mail

What it is

The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2025-02-04 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-05 15:10 UTC Last updatedMost recent change to the record

Details

Published: 2025-02-04 14:15 UTC
Last modified: 2026-10-05 15:10 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-1021
Record status: Modified

Affected

Mozilla Firefox < 135.0
Mozilla Thunderbird < 135.0

Attack profile CVSS 3.1 · 5.3

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Raw vector

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

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Fix and advisories

References

NVD record · CVE.org record