01 Record

CVE-2020-25032

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

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 4.01% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 90.1% of scored records. A rank, not a probability.
NVD base score: 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-08-31 03:57Z6 YR AGO

Last updated

2024-08-04 15:26Z2 YR AGO

Reserved

2020-08-31

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

66787452329fb2842cfc421fe83e27d433f1674e2dbfa76e8b98dce6aec39732

05 Affected products

VendorProductVersionsPlatforms

debiandebian_linuxNot specified—

flask-cors_projectflask-corsNot specified—

opensusebackports_sleNot specified—

opensuseleapNot specified—

redhatquayNot specified—

06 References

github.comhttps://github.com/corydolphin/flask-cors/releases/tag/3.0.9x_refsource_MISC
lists.opensuse.orgopenSUSE-SU-2020:1393http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.htmlvendor-advisoryx_refsource_SUSE
lists.opensuse.orgopenSUSE-SU-2020:1415http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.htmlvendor-advisoryx_refsource_SUSE
lists.opensuse.orgopenSUSE-SU-2020:1423http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.htmlvendor-advisoryx_refsource_SUSE
lists.opensuse.orgopenSUSE-SU-2020:1446http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.htmlvendor-advisoryx_refsource_SUSE
www.debian.orgDSA-4775https://www.debian.org/security/2020/dsa-4775vendor-advisoryx_refsource_DEBIAN

07 Fixed in

Debian 12

python-flask-cors
Fixed in 3.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

python-flask-cors
Fixed in 3.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

python-flask-cors
Fixed in 3.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

python-flask-cors
Fixed in 3.0.8-2ubuntu0.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.