CVE-2020-12415

MEDIUM 6.5CVE-2020-12415 · Published 09/07/2020 · updated 17/06/2026

In short

CVE-2020-12415 is a MEDIUM (CVSS 6.5) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 69.9% of all vulnerabilities.
Fix: update to 78.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 78.0`	`78.0`

Description

When "%2F" was present in a manifest URL, Firefox's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory. This vulnerability affects Firefox < 78.

References

lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html · Mailing List
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
security.gentoo.org/glsa/202007-10 · Third Party Advisory
mozilla.org/security/advisories/mfsa2020-24 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 78.0

78.0

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