CVE-2020-26978: mozilla firefox
CVSS: 6.1v3.1MediumModified
AliasesUBUNTU-CVE-2020-26978DEBIAN-CVE-2020-26978
Published 07-01-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-26978 is a medium (CVSS 6.1) vulnerability in mozilla firefox. EPSS estimates a 1.33% chance of exploitation in the next 30 days, higher than 70.7% of scored vulnerabilities.
CVSS score
6.1/10
010
Medium · v3.1 (NVD)EPSS score
1.33%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 30 · Related 14DLA-2496-1DLA-2497-1DSA-4813-1DSA-4815-1MGASA-2020-0461MGASA-2020-0462OPENSUSE-SU-2020:2317-1OPENSUSE-SU-2020:2318-1OPENSUSE-SU-2020:2324-1OPENSUSE-SU-2020:2325-1OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:10601-1OPENSUSE-SU-2024:14572-1RHSA-2020:5561RHSA-2020:5562RHSA-2020:5563RHSA-2020:5564RHSA-2020:5565RHSA-2020:5618RHSA-2020:5622RHSA-2020:5624RHSA-2020:5644RHSA-2020:5645SUSE-SU-2020:14584-1SUSE-SU-2020:3900-1SUSE-SU-2020:3901-1SUSE-SU-2020:3902-1SUSE-SU-2020:3903-1SUSE-SU-2020:3935-1USN-4671-1
Timeline
- 07-01-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 6.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Medium 5.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.33%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
+0.02 pp
From 1.32% on 19-09-2026
19-09-202619-10-2026
EPSS score1.33%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu6 products
- firefox< 84.0+build3-0ubuntu0.16.04.1 | < 84.0+build3-0ubuntu0.18.04.1 | < 84.0+build3-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 84 | < 84.0
- firefox_esr≥ unspecified, < 78.6 | < 78.6.0
- thunderbird≥ unspecified, < 78.6 | < 78.6.0
Debian2 products
- firefox-esr< 78.6.0esr-1
- thunderbird< 1:78.6.0-1
3 vendors · 11 products
