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CVE-2020-25032

20
FAUCET Score

CVE-2020-25032 is a directory traversal vulnerability in Flask-CORS versions prior to 3.0.9, affecting products like Debian and OpenSUSE. This high-severity flaw (CVSS 7.5) allows unauthenticated attackers to access private resources by manipulating pathnames, leading to a high impact on confidentiality. While no active exploitation or public exploit code has been identified, and community discussion is minimal, the vulnerability's ease of exploitation warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.9CPE matchmatch criteria
cpe:2.3:a:flask-cors_project:flask-cors:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.02%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0402 is in the 81st percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

pippatch availablevia ghsa
Product: Flask-CorsFixed in: 3.0.9
redhatno patchvia redhat_api
Product: Red Hat Quay 3Fixed in: python-flask-cors

Vendor Advisories (2)

pipGHSA-xc3p-ff3m-f46vhigh

Flask-Cors Directory Traversal vulnerability

May 6, 2021
redhatCVE-2020-25032Moderate

python-flask-cors: allows ../ directory traversal to access private resources

Aug 31, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-09/msg00028.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-09/msg00032.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-09/msg00039.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-09/msg00048.html
Mailing ListThird Party Advisory
github.com / corydolphin/flask-cors/releases/tag/3.0.9
Third Party Advisory
debian.org / security/2020/dsa-4775
Third Party Advisory