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Fencer Vulns
high 8.1

CVE-2025-11713 json

Potential user-assisted code execution in “Copy as cURL” command

published 2025-10-14 12 mo ago modified 2026-10-23 16 d ago also EUVD-2025-34201

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

Insufficient escaping in the “Copy as cURL” feature could have been used to trick a user into executing unexpected code on Windows. This did not affect the application when running on other operating systems. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

Patch / fix

  • mozilla firefox 140.4, 144
  • mozilla firefox_esr 140.4, 144
  • mozilla thunderbird 140.4, 144
  • mozilla thunderbird_esr 140.4, 144
  • thunderbird Ubuntu 22.04 LTS 1:140.7.1+build1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2025-11713

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • MozillaFirefox SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 140.5.0-150200.152.210.1
  • MozillaFirefox SLES for SAP applications 16.0, SLES 16.0 140.5.0-160000.1.1
  • MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Workstation Extension 15 SP6, SLE Module for Package Hub 15 SP7 +2 more 140.4.0-150200.8.242.1
  • MozillaFirefox SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 140.4.0-150200.152.207.1
  • MozillaFirefox SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 140.5.0-112.289.1
  • MozillaFirefox SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 140.4.0-112.286.1

suse advisories SUSE-SU-2025:4174-1SUSE-SU-2025:4173-1SUSE-SU-2025:21021-1SUSE-SU-2025:4006-1SUSE-SU-2025:3808-1SUSE-SU-2025:3775-1

  • MozillaFirefox openSUSE Leap 16.0 140.5.0-160000.1.1
  • MozillaThunderbird openSUSE Leap 16.0 140.4.0-bp160.1.1
  • MozillaFirefox openSUSE Tumbleweed 144.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 140.4.0-1.1
  • firefox-esr openSUSE Tumbleweed 140.4.0-1.1

opensuse advisories openSUSE-SU-2025:20065-1openSUSE-SU-2025:20026-1openSUSE-SU-2025:15645-1openSUSE-SU-2025:15646-1openSUSE-SU-2025:15632-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-11713 updated cvss 6.1

thunderbird: firefox: Potential user-assisted code execution in “Copy as cURL” command

  • Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 firefox, thunderbird Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird Red Hat Enterprise Linux 10 firefox, thunderbird, firefox-flatpak, thunderbird-flatpak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
12 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

  • Mozilla Firefox
  • Mozilla Thunderbird

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.