Vulnerability · NVD

CVE-2020-26958

CVE-2020-26958, medium severity (CVSS 6.1): 2 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 6.1
Exploitation: 1.4 %
Tracked apps: 2
Still exposed: 0

Published on 2020-12-09

Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Attack vector : Network No privileges required

Show raw CVSS vector

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

EPSS 1.36% above median percentile 70.7%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Firefox Windows winget:Mozilla.Firefox

Affected <83.0 Fixed in 83.0 Latest tracked 157.0 patched
Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <78.5 Fixed in 78.5 Latest tracked 157.0 patched

Observed affected builds (10)

78.4.0 78.3.2 78.2.1 78.1.1 78.1.0 78.0.1 78.0 68.10.0 68.9.0 68.8.0

Vulnerable CPE configurations (2)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	firefox All platforms (wildcard)	All platforms (wildcard)	<83.0	cpe:2.3:a:mozilla:firefox::::::::
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<78.5	cpe:2.3:a:mozilla:thunderbird::::::::

View on NVD ↗ Advisory · bugzilla.mozilla.org Advisory · www.mozilla.org

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