CVE-2025-1019

Reference Links

• https://bugzilla.mozilla.org/show_bug.cgi?id=1940162
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-11/
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-07/
• https://www.mozilla.org/security/advisories/mfsa2025-07/
• https://www.mozilla.org/security/advisories/mfsa2025-11/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-1019
• https://nvd.nist.gov/vuln/detail/CVE-2025-1019
• https://launchpad.net/bugs/cve/CVE-2025-1019
• https://security-tracker.debian.org/tracker/CVE-2025-1019
• https://ubuntu.com/security/CVE-2025-1019
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-07/#CVE-2025-1019

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2025-07
• MFSA2025-11

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2025-1009
• CVE-2025-1010
• CVE-2025-1018
• CVE-2025-1011
• CVE-2025-1012
• CVE-2025-1019
• CVE-2025-1013
• CVE-2025-1014
• CVE-2025-1016
• CVE-2025-1017
• CVE-2025-1020
• CVE-2025-0510
• CVE-2025-1015

Frequently Asked Questions

• What is the severity of CVE-2025-1019?

  CVE-2025-1019 has a medium severity rating due to its potential to enable spoofing attacks.

• How can I mitigate CVE-2025-1019?

  To mitigate CVE-2025-1019, users should upgrade to the latest version of Mozilla Thunderbird or Firefox beyond version 135.

• What does CVE-2025-1019 exploit?

  CVE-2025-1019 exploits the manipulation of the z-order of browser windows to hide fullscreen notifications.

• Who is affected by CVE-2025-1019?

  CVE-2025-1019 affects users of Mozilla Thunderbird and Mozilla Firefox versions prior to 135.

• Can CVE-2025-1019 lead to any security breaches?

  Yes, CVE-2025-1019 can potentially lead to security breaches through spoofing attacks.