onyx

onyx --cves cve-2023-25725

CVE-2023-25725

CRITPOCHAProxy
score
<0.1
cvss
9.1
epss
5.4%
published
2023-02-14
kev added
—
first seen

HAProxy before 2.7.3 contains a request smuggling vulnerability caused by acceptance of empty header field names in HTTP/1, letting attackers bypass access control, exploit requires sending crafted HTTP headers.

Timeline

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

events2023-02-14 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 5.4%2026-09-23: epss 5.4%2026-09-24: epss 5.4%2026-09-25: epss 5.4%2026-09-26: epss 5.4%2026-09-27: epss 5.4%2026-09-28: epss 5.4%2026-09-29: epss 5.4%2026-09-30: epss 5.4%2026-10-01: epss 5.4%2026-10-02: epss 5.4%2026-10-03: epss 5.4%2026-10-04: epss 5.4%2026-10-05: epss 5.4%2026-10-06: epss 5.4%2026-10-07: epss 5.4%2026-10-08: epss 5.4%2026-10-09: epss 5.4%2026-10-10: epss 5.4%2026-10-11: epss 5.4%2026-10-12: epss 5.4%2026-10-13: epss 5.4%2026-10-14: epss 5.4%2026-10-15: epss 5.4%2026-10-16: epss 5.4%2026-10-18: epss 5.4%2026-10-19: epss 5.4%2026-10-20: epss 5.4%2026-10-21: epss 5.4%5.4%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-Other CWE-444

References 6