Vulnerability · Published Nov 11, 2025 · Assigned by mozilla
CVE-2025-13015Spoofing issue in Firefox
Low 3.4
In plain English
A low-severity authentication bypass by spoofing in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.4Low
Exploit odds (30 days)0.2%top 86.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Spoofing issue in Firefox. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, and Firefox ESR 115.30.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | firefox | 140.5.0-2.el10_1 | ALSA-2025:21281 |
| AlmaLinux:8 | firefox | 140.5.0-1.el8_10.alma.1 | ALSA-2025:22363 |
| AlmaLinux:9 | firefox | 140.5.0-1.el9_7.alma.1 | ALSA-2025:21280 |
| AlmaLinux:9 | firefox-x11 | 140.5.0-1.el9_7.alma.1 | ALSA-2025:21280 |
| AlmaLinux:10 | thunderbird | 140.5.0-2.el10_1 | ALSA-2025:21843 |
| AlmaLinux:8 | thunderbird | 140.5.0-2.el8_10.alma.1 | ALSA-2025:21881 |
| Debian:12 | firefox-esr | 140.5.0esr-1~deb12u1 | DEBIAN-CVE-2025-13015 |
| Debian:12 | firefox-esr | 140.5.0esr-1~deb12u1 | DSA-6054-1 |
| Debian:13 | firefox-esr | 140.5.0esr-1~deb13u1 | DSA-6054-1 |
| Debian:13 | firefox-esr | 140.5.0esr-1~deb13u1 | DEBIAN-CVE-2025-13015 |
| Debian:14 | firefox-esr | 140.5.0esr-1 | DEBIAN-CVE-2025-13015 |
| Debian:12 | thunderbird | 1:140.5.0esr-1~deb12u1 | DSA-6059-1 |
| Debian:12 | thunderbird | 1:140.5.0esr-1~deb12u1 | DEBIAN-CVE-2025-13015 |
| Debian:13 | thunderbird | 1:140.5.0esr-1~deb13u1 | DSA-6059-1 |
| Debian:13 | thunderbird | 1:140.5.0esr-1~deb13u1 | DEBIAN-CVE-2025-13015 |
| Debian:14 | thunderbird | 1:140.5.0esr-1 | DEBIAN-CVE-2025-13015 |
| Rocky Linux:10 | firefox | 0:140.5.0-2.el10_1 | RLSA-2025:21281 |
| Rocky Linux:8 | firefox | 0:140.5.0-1.el8_10 | RLSA-2025:22363 |
| Rocky Linux:9 | firefox | 0:140.5.0-1.el9_7 | RLSA-2025:21280 |
| Rocky Linux:10 | thunderbird | 0:140.5.0-2.el10_1 | RLSA-2025:21843 |
| Rocky Linux:8 | thunderbird | 0:140.5.0-2.el8_10 | RLSA-2025:21881 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-13015 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-13015 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2025-13015 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2025-13015 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2025-13015 |
| Ubuntu:22.04:LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2025-13015 |
Affected products (as reported)
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N