CVE-2021-29978
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x...
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
- Record
CVE-2021-29978- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
- Record
CVE-2021-29978- Updated
- 2026-11-02
EUVDEUVD-2021-16437 No score
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
- Record
EUVD-2021-16437- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-24c6-8h6m-mfm3 No score
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x...
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
- Record
GHSA-24c6-8h6m-mfm3- Updated
- 2026-11-02
OSV
Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.
- Record
CVE-2021-29978- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-29978 is a critical vulnerability (CVSS 9.8) in Mozilla Vpn, published August 5, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.78%, the 86th percentile. No source names a fixed version.
References
mozilla.org/security/advisories/mfsa2021-31
github.com/mozilla-mobile/mozilla-vpn-client/issues/797
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nvd.nist.gov/vuln/detail/CVE-2021-29978