onyx

onyx --cves cve-2021-25741

CVE-2021-25741

HIGHPOCKubernetes
score
<0.1
cvss
8.8
epss
8.0%
published
2021-09-20
kev added
—
first seen

Kubernetes contains a security issue where a user may create a container with subpath volume mounts to access files and directories outside of the volume, including on the host filesystem, letting unauthorized access occur, exploit requires user to create specific subpath mounts.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2021-09-20 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 8.0%2026-09-23: epss 8.0%2026-09-24: epss 8.0%2026-09-25: epss 8.0%2026-09-26: epss 8.0%2026-09-27: epss 8.0%2026-09-28: epss 8.0%2026-09-29: epss 8.0%2026-09-30: epss 8.0%2026-10-01: epss 8.0%2026-10-02: epss 8.0%2026-10-03: epss 8.0%2026-10-04: epss 8.0%2026-10-05: epss 8.0%2026-10-06: epss 8.0%2026-10-07: epss 8.0%2026-10-08: epss 8.0%2026-10-09: epss 8.0%2026-10-10: epss 8.0%2026-10-11: epss 8.0%2026-10-12: epss 8.0%2026-10-13: epss 8.0%2026-10-14: epss 8.0%2026-10-15: epss 8.0%2026-10-16: epss 8.0%2026-10-18: epss 8.0%2026-10-19: epss 8.0%2026-10-20: epss 8.0%2026-10-21: epss 8.0%8.0%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx
  3. Public PoC

Exploit availability

Public PoC flagged by vulnx; no direct exploit link among the citations.

Weaknesses

CWE-20 CWE-552

References 3