CVE-2025-4083

NameCVE-2025-4083
DescriptionA process isolation vulnerability in Firefox stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird ESR < 128.10.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5910-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid138.0-1fixed
firefox-esr (PTS)bullseye115.14.0esr-1~deb11u1vulnerable
bullseye (security)128.9.0esr-1~deb11u1vulnerable
bookworm128.8.0esr-1~deb12u1vulnerable
bookworm (security)128.10.0esr-1~deb12u1fixed
trixie128.9.0esr-2vulnerable
sid128.10.0esr-1fixed
thunderbird (PTS)bullseye1:115.12.0-1~deb11u1vulnerable
bullseye (security)1:128.10.0esr-1~deb11u1vulnerable
bookworm1:128.8.0esr-1~deb12u1vulnerable
bookworm (security)1:128.9.0esr-1~deb12u1vulnerable
trixie1:128.9.0esr-1vulnerable
sid1:128.10.0esr-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)138.0-1
firefox-esrsourcebookworm128.10.0esr-1~deb12u1DSA-5910-1
firefox-esrsource(unstable)128.10.0esr-1
thunderbirdsource(unstable)1:128.10.0esr-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2025-28/#CVE-2025-4083
https://www.mozilla.org/en-US/security/advisories/mfsa2025-29/#CVE-2025-4083
https://www.mozilla.org/en-US/security/advisories/mfsa2025-32/#CVE-2025-4083

Search for package or bug name: Reporting problems