High severity · published Aug 31, 2020
CVE-2020-25032
An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9
7.5
CVSS
4%
EPSS
No
On KEV
Description
An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.0% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BS
Backports Sle · Opensuse
15.0; 15.0 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
FL
Flask-cors · Flask-cors Project
before 3.0.9 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25032
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25032
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.html
Third Party Advisory
https://github.com/corydolphin/flask-cors/releases/tag/3.0.9
Third Party Advisory
https://www.debian.org/security/2020/dsa-4775
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