CVE-2020-12415
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.26% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 69.5% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-07-09 14:39Z6 YR AGO
- Last updated
- 2024-08-04 11:56Z2 YR AGO
- Reserved
- 2020-04-28
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 7f9f020b705c7e969df570d433baa762bdbc47b485e49334e7bc84c7e1744ed4
05 Affected products
06 References
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-24/
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1586630
- lists.opensuse.orgopenSUSE-SU-2020:0983http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
- lists.opensuse.orgopenSUSE-SU-2020:1017http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
- security.gentoo.orgGLSA-202007-10https://security.gentoo.org/glsa/202007-10
07 Fixed in
Ubuntu 16.04 LTS
- firefox Fixed in 78.0.1+build1-0ubuntu0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- firefox Fixed in 78.0.1+build1-0ubuntu0.18.04.1
- mozjs38 No fix yet
- mozjs52 No fix yet
- thunderbird Fixed in 1:78.8.1+build1-0ubuntu0.18.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- firefox Fixed in 78.0.1+build1-0ubuntu0.20.04.1
- mozjs52 No fix yet
- mozjs68 No fix yet
- thunderbird Fixed in 1:78.7.1+build1-0ubuntu0.20.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.