CVE-2025-5265

Due 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, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.
Command Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4.8 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
mozillaCNA
---
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CISA-ADPADP
4.8 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 2%
VendorProductVersion
mozillafirefox
𝑥
< 115.24.0
mozillafirefox
𝑥
< 139.0
mozillafirefox
116.0 ≤
𝑥
< 128.11.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
140.0.4-1
fixed
firefox-esr
bullseye
115.14.0esr-1~deb11u1
fixed
bullseye (security)
128.12.0esr-1~deb11u1
fixed
bookworm
128.10.0esr-1~deb12u1
fixed
bookworm (security)
128.12.0esr-1~deb12u1
fixed
trixie
128.11.0esr-1
fixed
sid
128.12.0esr-1
fixed
thunderbird
bullseye
1:115.12.0-1~deb11u1
fixed
bullseye (security)
1:128.12.0esr-1~deb11u1
fixed
bookworm
1:128.10.0esr-1~deb12u1
fixed
bookworm (security)
1:128.12.0esr-1~deb12u1
fixed
trixie
1:128.12.0esr-1
fixed
sid
1:128.12.0esr-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
plucky
not-affected
oracular
not-affected
noble
not-affected
jammy
not-affected
focal
dne
mozjs102
plucky
dne
oracular
dne
noble
ignored
jammy
ignored
focal
dne
mozjs115
plucky
ignored
oracular
ignored
noble
ignored
jammy
dne
focal
dne
mozjs38
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
dne
bionic
needs-triage
mozjs52
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
ignored
bionic
ignored
mozjs68
plucky
dne
oracular
dne
noble
dne
jammy
dne
focal
ignored
mozjs78
plucky
dne
oracular
dne
noble
dne
jammy
ignored
focal
dne
mozjs91
plucky
dne
oracular
dne
noble
dne
jammy
ignored
focal
dne
thunderbird
plucky
not-affected
oracular
not-affected
noble
not-affected
jammy
needed
focal
dne
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1962301
https://www.mozilla.org/security/advisories/mfsa2025-42/
https://www.mozilla.org/security/advisories/mfsa2025-43/
https://www.mozilla.org/security/advisories/mfsa2025-44/
https://www.mozilla.org/security/advisories/mfsa2025-45/
https://www.mozilla.org/security/advisories/mfsa2025-46/