CVE-2021-27213

9.8 criticalEPSS 2.6%

Critical (9.8) in pystemon project pystemon. EPSS 2.6% chance of exploitation in the next 30 days.

config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.

Severity

9.8 critical

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

EPSS: 2.6% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2021-02-14
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19