onyx

onyx --cves cve-2025-25253

CVE-2025-25253

HIGHPOCFortinet FortiOS
score
<0.1
cvss
7.5
epss
0.1%
published
2025-10-14
kev added
—
first seen

FortiProxy 7.6.1 and below, 7.4.8 and below, 7.2 all versions, 7.0 all versions and FortiOS 7.6.2 and below, 7.4.8 and below, 7.2 all versions, 7.0 all versions contain an improper validation of certificate with host mismatch in ZTNA proxy, letting unauthenticated man-in-the-middle attackers intercept and tamper with connections, exploit requires man-in-the-middle position.

Timeline

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

events2025-10-14 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 0.1%2026-09-23: epss 0.1%2026-09-24: epss 0.1%2026-09-25: epss 0.1%2026-09-26: epss 0.1%2026-09-27: epss 0.1%2026-09-29: epss 0.1%2026-09-30: epss 0.1%2026-10-01: epss 0.1%2026-10-02: epss 0.1%2026-10-03: epss 0.1%2026-10-04: epss 0.1%2026-10-05: epss 0.1%2026-10-06: epss 0.1%2026-10-07: epss 0.1%2026-10-08: epss 0.1%2026-10-09: epss 0.1%2026-10-10: epss 0.1%2026-10-11: epss 0.1%2026-10-12: epss 0.1%2026-10-13: epss 0.1%2026-10-14: epss 0.1%2026-10-15: epss 0.1%2026-10-16: epss 0.1%2026-10-18: epss 0.1%2026-10-19: epss 0.1%2026-10-20: epss 0.1%2026-10-21: epss 0.1%0.1%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-297

References 2