onyx

onyx --cves cve-2023-21939

CVE-2023-21939

MEDPOCOpenJDK
score
<0.1
cvss
5.3
epss
2.5%
published
2023-04-18
kev added
—
first seen

Oracle Java SE (8u361, 8u361-perf, 11.0.18, 17.0.6, 20) and Oracle GraalVM Enterprise Edition (20.3.9, 21.3.5, 22.3.1) contain a remote code execution caused by insecure handling in Swing component, letting unauthenticated attackers with network access via HTTP compromise the system, exploit requires loading untrusted code or API misuse.

Timeline

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

events2023-04-18 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 2.5%2026-09-23: epss 2.5%2026-09-24: epss 2.5%2026-09-25: epss 2.5%2026-09-26: epss 2.5%2026-09-27: epss 2.5%2026-09-28: epss 2.5%2026-09-29: epss 2.5%2026-09-30: epss 2.5%2026-10-01: epss 2.5%2026-10-02: epss 2.5%2026-10-03: epss 2.5%2026-10-04: epss 2.5%2026-10-05: epss 2.5%2026-10-06: epss 2.5%2026-10-07: epss 2.5%2026-10-08: epss 2.5%2026-10-09: epss 2.5%2026-10-10: epss 2.5%2026-10-11: epss 2.5%2026-10-12: epss 2.5%2026-10-13: epss 2.5%2026-10-14: epss 2.5%2026-10-15: epss 2.5%2026-10-16: epss 2.5%2026-10-18: epss 2.5%2026-10-19: epss 2.5%2026-10-20: epss 2.5%2026-10-21: epss 2.5%2.5%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

NVD-CWE-noinfo

References 7