CVE-2020-12415: mozilla firefox Incorrect Default Permissions
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2020-12415
Published 09-07-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-12415 is a medium (CVSS 6.5) Incorrect Default Permissions vulnerability in mozilla firefox. EPSS estimates a 1.26% chance of exploitation in the next 30 days, higher than 69.2% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.26%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 9 · Related 8Timeline
- 09-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.26%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
+0.01 pp
From 1.26% on 18-09-2026
18-09-202618-10-2026
EPSS score1.26%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu5 products
- firefox< 78.0.1+build1-0ubuntu0.16.04.1 | < 78.0.1+build1-0ubuntu0.18.04.1 | < 78.0.1+build1-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1 | < 1:78.7.1+build1-0ubuntu0.20.04.1
Mozilla1 product
- firefox≥ unspecified, < 78 | < 78.0
Opensuse1 product
- leapEOL15.1 | 15.2
3 vendors · 7 products
References
10 links- bugzilla.mozilla.org/show_bug.cgi?id=1586630X Refsource MISCIssue TrackingPermissions RequiredVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory