Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2025-31366
Fortinet FortiSASE — An Improper Neutralization of Input During Web Page Generation vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6…
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N R C L L N 6.1 .0040 32.8 —
AFFECTED
Product Versions Fixed
FortiSASE 25.2.a – —
FortiOS 7.6.0 – —
FortiProxy 7.6.0 – —
TIMELINE
Mar 28 Reserved by fortinet
Oct 14 Published (CNA: fortinet)
Oct 18 RESCORED — CVE-2025-31366 (Fortinet FortiSASE). CVSS 4.5 → 6.1 (NVD).
Description
An Improper Neutralization of Input During Web Page Generation vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions, FortiSASE 25.2.a may allow an unauthenticated attacker to perform a reflected cross site scripting (XSS) via crafted HTTP requests.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| March 28, 2025 | Reserved | Reserved by fortinet |
| October 14, 2025 | Published | Published (CNA: fortinet) |
| October 18, 2026 | RESCORED | RESCORED — CVE-2025-31366 (Fortinet FortiSASE). CVSS 4.5 → 6.1 (NVD). |
Affected
Affected products and packages — 3 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Fortinet | FortiSASE | — | 25.2.a | — |
| Fortinet | FortiOS | — | 7.6.0 | — |
| Fortinet | FortiProxy | — | 7.6.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-31366 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
