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The vulnerability of the HTTPS-Only Mode mode in the Mozilla Firefox browser allows a hacker to carry out a clickjacking attack.

🗓️ 27 Jun 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 4 Views

Firefox HTTPS-Only Mode has a user interface information representation error that enables remote clickjacking.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
FreeBSD		firefox -- multiple vulnerabilities
24 Jun 202500:00
–freebsd
ATTACKERKB		CVE-2025-6434
24 Jun 202512:28
–attackerkb
AlpineLinux		CVE-2025-6434
24 Jun 202513:15
–alpinelinux
AstraLinux		Astra Linux – Vulnerability in Firefox
19 Jun 202611:10
–astralinux
Circl		CVE-2025-6434
24 Jun 202516:50
–circl
CNNVD		Mozilla Firefox 安全漏洞
24 Jun 202500:00
–cnnvd
CVE		CVE-2025-6434
24 Jun 202512:28
–cve
Cvelist		CVE-2025-6434 HTTPS-Only exception screen lacked anti-clickjacking delay
24 Jun 202512:28
–cvelist
Debian CVE		CVE-2025-6434
24 Jun 202512:28
–debiancve
EUVD		EUVD-2025-21375
3 Oct 202520:07
–euvd
Rows per page
Vulners
Node
mozillafirefoxRange<140
SourceLink
nvdwww.nvd.nist.gov/vuln/detail/CVE-2025-6434
mozillawww.mozilla.org/security/advisories/mfsa2025-51/
wikiwww.wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17
altspwww.altsp.su/obnovleniya-bezopasnosti/
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/
webwww.web.nvd.nist.gov/view/vuln/detail
mozillawww.mozilla.org/security/advisories/mfsa2025-51.html
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04 Mar 2026 00:00Current
5.4Medium risk
Vulners AI Score5.4
CVSS 34.3
CVSS 25
EPSS0.00229
mozilla firefoxsecure web modeui information errorremote clickjacking
4