CVE-2025-5264 | Potential local code execution in “Copy as cURL” command

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.

Published: 2025-05-27 Last update: 2026-04-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-5264 is rated Low Risk (24.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-5264

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-20 0.02% 0.05% +0.03%
2 2025-10-23 0.06% 0.02% -0.04%
3 2025-09-26 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-5264

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.3 3.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-5264

OS Trackers for CVE-2025-5264

vendor priority summary link
alpine — CVE-2025-5264: 3 source package rows (firefox, firefox-esr, thunderbird); 364 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 364. https://security.alpinelinux.org/vuln/CVE-2025-5264
debian not yet assigned CVE-2025-5264 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, thunderbird), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2025-5264
redhat medium — https://access.redhat.com/security/cve/CVE-2025-5264
suse high CVE-2025-5264 severity important: SUSE including 41 source package names (2.1.3-4.11:qemu-guest-agent-8.2.7-1.1, MozillaFirefox-128.11.0-112.262.1, …), 150 product×package rows across 50 product lines (Container suse/kiosk/firefox-esr, Container suse/sl-micro/6.0/kvm-os-container, … (50 product lines)): Fixed 147, First Fixed 3. https://www.suse.com/security/cve/CVE-2025-5264/
ubuntu medium CVE-2025-5264 medium priority: Ubuntu including 9 source packages (firefox, mozjs102, …), 65 status rows across 8 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream): DNE 35, ignored 10, needs-triage 9, not-affected 9, released 2. https://ubuntu.com/security/CVE-2025-5264

Affected software / configurations for CVE-2025-5264

Vendor Product Version Raw CPE
mozilla firefox < 115.24.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
mozilla firefox < 139.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
mozilla firefox >= 116.0, < 128.11.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*

References for CVE-2025-5264

cvelogic Threat Intelligence