CVE-2020-15655: canonical ubuntu_linux
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2020-15655
Published 10-08-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-15655 is a medium (CVSS 6.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.52% chance of exploitation in the next 30 days, higher than 74.2% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.52%
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 10 · Related 10Timeline
- 10-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
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:H/I:N/A:NSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
1.52%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
+0.01 pp
From 1.51% on 19-09-2026
19-09-202619-10-2026
EPSS score1.52%
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
Ubuntu5 products
- firefox< 79.0+build1-0ubuntu0.16.04.2 | < 79.0+build1-0ubuntu0.18.04.1 | < 79.0+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
Mozilla3 products
- firefox≥ unspecified, < 79 | < 79.0
- firefox_esr≥ unspecified, < 78.1 | < 78.1
- thunderbird≥ unspecified, < 78.1 | < 78.1
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Opensuse1 product
- leapEOL15.2
4 vendors · 10 products
References
11 links- lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory