CVE-2020-15679

HIGH

Mozilla VPN <1.2.2 - Session Fixation

Title source: llm

Description

An OAuth session fixation vulnerability existed in the VPN login flow, where an attacker could craft a custom login URL, convince a VPN user to login via that URL, and obtain authenticated access as that user. This issue is limited to cases where attacker and victim are sharing the same source IP and could allow the ability to view session states and disconnect VPN sessions. This vulnerability affects Mozilla VPN iOS 1.0.7 < (929), Mozilla VPN Windows < 1.2.2, and Mozilla VPN Android 1.1.0 < (1360).

References (4)

[Patch, Third Party Advisory] https://github.com/mozilla-mobile/guardian-vpn-android/commit/981c840276ef3aee98cf5d42993d484ee99b28d9

View Patch ZIP pw:eip

[Patch, Third Party Advisory] https://github.com/mozilla-mobile/guardian-vpn-ios/commit/4309f5c9bd2c15cdfd39ac173665fad3f2598b54

View Patch ZIP pw:eip

[Patch, Third Party Advisory] https://github.com/mozilla-services/guardian-vpn-windows/commit/ac6f562973a83f6758cd7ab7aa313e863047d41b

View Patch ZIP pw:eip

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2020-48/

Scores

CVSS v3 7.6

EPSS 0.0058

EPSS Percentile 68.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-384

Status published

Products (4)

mozilla/vpn < 1.0.7_\(929\)

mozilla/vpn < 1.2.2

mozilla/vpn 1.0.7 - 1.0.7_\(929\)

mozilla/vpn 1.1.0 - 1.1.0_\(1360\)

Published Dec 22, 2022

Tracked Since Feb 18, 2026