CVE-2025-5265

NameCVE-2025-5265
DescriptionDue to insufficient escaping of the ampersand character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid139.0-1fixed
firefox-esr (PTS)bullseye115.14.0esr-1~deb11u1fixed
bullseye (security)128.11.0esr-1~deb11u1fixed
bookworm128.10.0esr-1~deb12u1fixed
bookworm (security)128.11.0esr-1~deb12u1fixed
sid, trixie128.11.0esr-1fixed
thunderbird (PTS)bullseye1:115.12.0-1~deb11u1fixed
bullseye (security)1:128.11.0esr-1~deb11u1fixed
bookworm1:128.10.0esr-1~deb12u1fixed
bookworm (security)1:128.11.0esr-1~deb12u1fixed
sid, trixie1:128.11.0esr-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)(not affected)
firefox-esrsource(unstable)(not affected)
thunderbirdsource(unstable)(not affected)

Notes

- firefox <not-affected> (Only affects Firefox on Windows)
- firefox-esr <not-affected> (Only affects Firefox ESR on Windows)
- thunderbird <not-affected> (Only affects Thunderbird on Windows)
https://www.mozilla.org/en-US/security/advisories/mfsa2025-42/#CVE-2025-5265
https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5265
https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5265

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