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. NOTE: a third party indicates that exploitation is extremely unlikely unless the machine is already compromised; in other cases, the attacker would be unable to write their payload to the cache and generate the required collision
Published 2021-05-13 23:15:07
Updated 2024-07-19 19:15:06
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Execute codeGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2021-33026

1.13%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 85 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-33026

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2021-33026

References for CVE-2021-33026

Products affected by CVE-2021-33026

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