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MEDIUM

CVE-2025-5264

Potential local code execution in “Copy as cURL” command

CVSS v3

4.8

MEDIUM

EPSS Score

0.3 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • firefoxAlmaLinux:10all versions · fixed in 128.11.0-1.el10_0
  • firefoxAlmaLinux:9all versions · fixed in 128.11.0-1.el9_6.alma.1and 2 other packages
  • firefoxAlmaLinux:8all versions · fixed in 128.11.0-1.el8_10.alma.1and 1 other package
  • thunderbirdAlmaLinux:10all versions · fixed in 128.11.0-1.el10_0.alma.1

Vendor advisories

  • CVE-2025-5264 Red Hat Product Security249 products fixed · 8 known affected

    firefox: thunderbird: Potential local code execution in “Copy as cURL” command

    rhel10/firefox-flatpak.src as a component of Red Hat Enterprise Linux 10 · rhel10/thunderbird-flatpak.src as a component of Red Hat Enterprise Linux 10 · firefox as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:9155 Red Hat Product Security21 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2025:9072 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2025:9071 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2025:9077 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2025:9074 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: firefox security update

16 more advisories

Full record on NVD

Description

Due to insufficient escaping of the newline 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 vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Published
2025-05-27
Last Modified
2026-04-13

Frequently asked questions

What is CVE-2025-5264?

Due to insufficient escaping of the newline 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 vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

Is CVE-2025-5264 actively exploited?

Active exploitation of CVE-2025-5264 has not been confirmed. Its EPSS score was 0.3% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-5264?

CVE-2025-5264 has a CVSS v3 base score of 4.8 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.

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