7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
49.6%
When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by a proxy to other clients. If the proxy also caches Set-Cookie
headers, it may send one client’s session
cookie to other clients. The severity depends on the application’s use of the session, and the proxy’s behavior regarding cookies. The risk depends on all these conditions being met.
session.permanent = True
.SESSION_REFRESH_EACH_REQUEST
is enabled (the default).Cache-Control
header to indicate that a page is private or should not be cached.This happens because vulnerable versions of Flask only set the Vary: Cookie
header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified.
github.com/pallets/flask
github.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b
github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965
github.com/pallets/flask/releases/tag/2.2.5
github.com/pallets/flask/releases/tag/2.3.2
github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq
github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2023-62.yaml
lists.debian.org/debian-lts-announce/2023/08/msg00024.html
nvd.nist.gov/vuln/detail/CVE-2023-30861
security.netapp.com/advisory/ntap-20230818-0006
www.debian.org/security/2023/dsa-5442
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
49.6%