CVE-2025-5265 | Potential local code execution in “Copy as cURL” command

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 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-2025-5265 is rated Low Risk (25.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). 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-2025-5265

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 2026-03-23 0.02% 0.06% +0.04%
2 2025-05-28 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-5265

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-2025-5265

OS Trackers for CVE-2025-5265

vendor priority summary link
alpine — CVE-2025-5265: 2 source package rows (firefox, firefox-esr); 293 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 293. https://security.alpinelinux.org/vuln/CVE-2025-5265
debian unimportant CVE-2025-5265 unimportant 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-2025-5265
redhat medium — https://access.redhat.com/security/cve/CVE-2025-5265
suse high CVE-2025-5265 severity important: SUSE including 36 source package names (2.1.3-4.11:qemu-guest-agent-8.2.7-1.1, MozillaFirefox-128.11.0-112.262.1, …), 145 product×package rows across 48 product lines (Container suse/kiosk/firefox-esr, Container suse/sl-micro/6.0/kvm-os-container, … (48 product lines)): Fixed 142, First Fixed 3. https://www.suse.com/security/cve/CVE-2025-5265/
ubuntu medium CVE-2025-5265 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, not-affected 10, needs-triage 8, released 2. https://ubuntu.com/security/CVE-2025-5265

Affected software / configurations for CVE-2025-5265

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-2025-5265

cvelogic Threat Intelligence