VulnerabilityModified
CVE-2021-29978
This vulnerability affects Mozilla VPN < 2.3.
CRITICAL 9.8EPSS 2.78%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.78% probability · 86th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- mozilla/mozilla vpn
- Source
- security@mozilla.org
EPSS 2.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/797Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/798Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/799Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/800Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/801Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/803Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/804Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/805Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/806Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/808Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/809Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/810Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/812Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/pull/816Patch, Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-31/Vendor Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/797Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/798Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/799Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/800Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/801Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/803Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/804Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/805Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/806Exploit, Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/808Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/809Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/810Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/issues/812Third Party Advisory
- https://github.com/mozilla-mobile/mozilla-vpn-client/pull/816Patch, Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-31/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.