Medium severity · published Aug 10, 2020
CVE-2020-15655
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
6.5
CVSS
1.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 79.0 · source: NVD
FE
Firefox Esr · Mozilla
before 78.1 · source: NVD
LE
Leap · Opensuse
15.2 · source: NVD
TH
Thunderbird · Mozilla
before 78.1 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15655
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15655
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1645204
Third Party Advisory
https://usn.ubuntu.com/4443-1/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-30/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-32/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-33/
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