CVE-2021-33026 Information

Description

The Flask-Caching extension through 1.10.1 for Flask relies on Pickle for serialization which may lead to remote code execution or local privilege escalation. If an attacker gains access to cache storage (e.g. filesystem Memcached Redis etc.) they can construct a crafted payload poison the cache and execute Python code.

CVSS Vector

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

Reference

https://github.com/sh4nks/flask-caching/pull/209

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8