Mozilla Firefox (en-US) 138.0
Mozilla Firefox (en-US) 138.0, released April 29, 2025, fixes 11 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 11 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Firefox (en-US) | 138.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-2817 | Privilege escalation in Thunderbird Updater | 8.8 | 0.0067 | None reported |
| High | CVE-2025-4091 | Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 | 8.8 | 0.0051 | None reported |
| High | CVE-2025-4083 | Process isolation bypass using "javascript:" URI links in cross-origin frames | 9.1 | 0.0046 | None reported |
| High | CVE-2025-4087 | Unsafe attribute access during XPath parsing | 8.8 | 0.0032 | None reported |
| High | CVE-2025-4085 | Potential information leakage and privilege escalation in UITour actor | 7.1 | 0.0031 | None reported |
| Routine | CVE-2025-4082 | WebGL shader attribute memory corruption in Thunderbird for macOS | 5.9 | 0.0046 | None reported |
| Routine | CVE-2025-4090 | Leaked library paths in Thunderbird for Android | 5.3 | 0.0033 | None reported |
| Routine | CVE-2025-4092 | Memory safety bugs fixed in Firefox 138 and Thunderbird 138 | 6.5 | 0.0031 | None reported |
| Routine | CVE-2025-4086 | Specially crafted filename could be used to obscure download type | 6.5 | 0.0030 | None reported |
| Routine | CVE-2025-4089 | Potential local code execution in "copy as cURL" command | 5.1 | 0.0019 | None reported |
| Routine | CVE-2025-4088 | Cross-site request forgery via storage access API redirects | 6.5 | 0.0018 | None reported |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.