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The vulnerability in the Firefox web browser and Thunderbird email client relates to an improper limitation on the visible layers of the user interface, allowing a malicious actor to compromise data integrity.

🗓️ 06 Oct 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 1 Views

Firefox and Thunderbird UI layer limit flaw enables remote attackers to compromise data integrity.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
AlpineLinux		CVE-2025-1019
4 Feb 202514:15
–alpinelinux
AstraLinux		Astra Linux – Vulnerability in Firefox
11 Feb 202507:35
–astralinux
Chainguard		CVE-2025-1019 vulnerabilities
4 Feb 202514:15
–cgr
Circl		CVE-2025-1019
4 Feb 202514:16
–circl
CNNVD		Mozilla Firefox 安全漏洞
4 Feb 202500:00
–cnnvd
CVE		CVE-2025-1019
4 Feb 202513:58
–cve
Cvelist		CVE-2025-1019 Fullscreen notification not properly displayed
4 Feb 202513:58
–cvelist
Debian CVE		CVE-2025-1019
4 Feb 202513:58
–debiancve
EUVD		EUVD-2025-1974
3 Oct 202520:07
–euvd
FreeBSD		mozilla -- multiple vulnerabilities
4 Feb 202500:00
–freebsd
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Vulners
Node
mozillathunderbirdRange<135
OR
mozillafirefoxRange<135
SourceLink
nvdwww.nvd.nist.gov/vuln/detail/CVE-2025-1019
security-trackerwww.security-tracker.debian.org/tracker/CVE-2025-1019
wikiwww.wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17
mozillawww.mozilla.org/en-US/security/advisories/mfsa2025-07/
mozillawww.mozilla.org/security/advisories/mfsa2025-07/
mozillawww.mozilla.org/security/advisories/mfsa2025-11/
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/2.14/
wikiwww.wiki.astralinux.ru/astra-linux-se47-bulletin-2025-1020SE47
wikiwww.wiki.astralinux.ru/astra-linux-se16-bulletin-20251225SE16
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/3.1/
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04 Mar 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 34.3
CVSS 25
EPSS0.00337
FirefoxThunderbirduser interfacevisible layersdata integrityremote attacker
1