CVE-2025-6431
Publication date 24 June 2025
Last updated 25 June 2025
Ubuntu priority
When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| firefox | 25.04 plucky |
Not affected
|
| 24.10 oracular |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| mozjs102 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Ignored | |
| 22.04 LTS jammy | Ignored | |
| mozjs115 | 25.04 plucky | Ignored |
| 24.10 oracular | Ignored | |
| 24.04 LTS noble | Ignored | |
| 22.04 LTS jammy | Not in release | |
| mozjs38 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 18.04 LTS bionic |
Needs evaluation
|
|
| mozjs52 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal | Ignored | |
| 18.04 LTS bionic | Ignored | |
| mozjs68 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal | Ignored | |
| mozjs78 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Ignored | |
| mozjs91 | 25.04 plucky | Not in release |
| 24.10 oracular | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Ignored | |
| thunderbird | 25.04 plucky |
Not affected
|
| 24.10 oracular |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Vulnerable
|
Notes
mdeslaur
mozjs* contain a copy of the SpiderMonkey JavaScript engine. It is not feasible to backport security fixes to the mozjs* packages, as such, marking them as ignored. starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap starting with Ubuntu 24.04, the thunderbird package is just a script that installs the Thunderbird snap
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.5 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |