CVE-2025-1020
First published: Tue Feb 04 2025(Updated: )
Last updated 11 February 2025
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/firefox | 135.0-1 | |
| Thunderbird | <135 | 135 |
| Firefox | <135.0 | |
| Thunderbird | >=131.0<135.0 | |
| Firefox | <135 | 135 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1939063%2C1942169
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-11/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-07/
- https://www.mozilla.org/security/advisories/mfsa2025-07/
- https://www.mozilla.org/security/advisories/mfsa2025-11/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-1020
- https://nvd.nist.gov/vuln/detail/CVE-2025-1020
- https://launchpad.net/bugs/cve/CVE-2025-1020
- https://security-tracker.debian.org/tracker/CVE-2025-1020
- https://ubuntu.com/security/CVE-2025-1020
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-07/#CVE-2025-1020
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2025-1020?
CVE-2025-1020 is considered a high-severity vulnerability due to the potential for arbitrary code execution.
How do I fix CVE-2025-1020?
To fix CVE-2025-1020, upgrade to Firefox or Thunderbird version 135 or later.
Which versions of Firefox are affected by CVE-2025-1020?
Firefox versions up to and including 134 are affected by CVE-2025-1020.
Which versions of Thunderbird are affected by CVE-2025-1020?
Thunderbird versions up to and including 134 are affected by CVE-2025-1020.
What types of vulnerabilities does CVE-2025-1020 include?
CVE-2025-1020 includes memory safety bugs that could potentially lead to memory corruption.
- agent/type
- agent/first-publish-date
- agent/author
- agent/last-modified-date
- agent/severity
- agent/weakness
- collector/mitre-cve
- source/MITRE
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/source
- agent/references
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-api
- collector/mozilla-advisory
- source/Mozilla
- agent/softwarecombine
- agent/tags
- package-manager/debian
- vendor/mozilla
- canonical/firefox
- canonical/thunderbird
- version/thunderbird/131.0