CVE-2025-59719

Description

An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.

Overview

State: PUBLISHED
Assigner (CNA): fortinet
CVSS severity: CRITICAL
CVSS score: 9.1 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Effective score: 9.1 / 10 CRITICAL source: CNA overview
CWE(s): CWE-347
Reserved: 2025-09-19
Published: 2025-12-09 18:20 UTC
Last updated: 2026-03-20 13:39 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/59xxx/CVE-2025-59719.json
Linked Threat: CVE-2025-59719 — CVE-2025-59719

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2025-12-09 18:15:55 UTC
NVD last modified: 2026-06-17 09:46:35 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: psirt@fortinet.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.2405 (probability of exploitation in next 30 days)
EPSS percentile: 97.61% vs all CVEs — higher = more likely to be exploited, as of 2026-07-27

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2025-202191
Assigner: fortinet
Published: Dec 9, 2025, 5:20:11 PM
Updated: Mar 20, 2026, 12:39:05 PM
EUVD base score (CVSS 3.1): 9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
EUVD-reported EPSS: 0.2600
Vendors: Fortinet
Products: FortiWeb (7.6.0 ≤7.6.4)

FortiWeb (7.4.0 ≤7.4.9)

FortiWeb (8.0.0)
Aliases: GHSA-chq4-235q-jp7w

ENISA description: An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.

EUVD references (1)

https://fortiguard.fortinet.com/psirt/FG-IR-25-647

Affected products (1)

Vendor	Product	Versions	Platforms
Fortinet	FortiWeb	`8.0.0` (affected), `7.6.0` (affected), `7.4.0` (affected)	—

Affected products — CPE 2.3 (2) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.0:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://fortiguard.fortinet.com/psirt/FG-IR-25-647

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

http://cwe.mitre.org/data/definitions/347.html rapid7:cwe.mitre.org
https://attackerkb.com/topics/CVE-2025-59719 rapid7:attackerkb.com
https://fortiguard.fortinet.com/psirt/FG-IR-25-647 rapid7:fortiguard.fortinet.com
https://www.cve.org/CVERecord?id=CVE-2025-59719 rapid7:www.cve.org

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://fortiguard.fortinet.com/psirt/FG-IR-25-647 psirt@fortinet.com Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-864900.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2025-59719 - Exploits & Severity - Feedly

web:feedly.com

CVE-2025-59719 is a critical vulnerability with a CVSS score of 9.1, allowing unauthenticated attackers to bypass FortiCloud Single Sign-On (SSO) authentication through crafted SAML messages.

2026-05-22 14:47 UTC
Microsoft Patch Tuesday, July 2025 - SANS Internet Storm Center

web:isc.sans.edu

Macs are affected as well, but a patch is currently only available for Windows. CVE - 2025 -49719: This vulnerability has already been made public. It does allow for information disclosure on a Microsoft SQL Server. To patch , you must patch the OLE DB Driver. CVE - 2025 -49717: Exploitation is considered less likely for this vulnerability.

2026-05-22 14:47 UTC
Nvd - Cve-2025-59719

web:nvd.nist.gov

An official website of the United States government Here's how you know

2026-05-22 14:47 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 14:47 UTC
Microsoft Patch Tuesday July 2025: 130 Vulnerabilities Fixed

web:thecyberexpress.com

Microsoft Patch Tuesday July 2025 was the busiest since January, with 130 vulnerabilities fixed - including 17 high-risk ones.

2026-05-22 14:47 UTC
Hackers exploit newly patched Fortinet auth bypass flaws

web:www.bleepingcomputer.com

Hackers are exploiting critical-severity vulnerabilities affecting multiple Fortinet products to get unauthorized access to admin accounts and steal system configuration files.

2026-05-22 14:47 UTC
Microsoft Patch Tuesday, July 2025 Edition | The Computer Center

web:www.computer-center.com

Microsoft Patch Tuesday, July 2025 Edition by James Pearson | Jul 8, 2025 | News Microsoft today released updates to fix at least 137 security vulnerabilities in its Windows operating systems and supported software.

2026-05-22 14:47 UTC
CVE-2025-59719 : An improper verification of cryptographic signature ...

web:www.cvedetails.com

CVSS scores for CVE-2025-59719 ... CWE ids for CVE-2025-59719 CWE-347 Improper Verification of Cryptographic Signature The product does not verify, or incorrectly verifies, the cryptographic signature for data.

2026-05-22 14:47 UTC
CVE-2025-59719: Fortinet FortiWeb Auth Bypass Vulnerability

web:www.sentinelone.com

CVE-2025-59719 is an authentication bypass vulnerability in Fortinet FortiWeb. Learn about its impact, affected versions, and mitigation methods.

2026-05-22 14:47 UTC
Microsoft's July 2025 Patch Tuesday Addresses 128 CVEs (CVE ... - Tenable

web:www.tenable.com

Microsoft addresses 128 CVEs in its July 2025 Patch Tuesday release, with 12 rated critical, and 115 rated important and one rated as moderate. Our counts omitted nine vulnerabilities reported by AMD and MITRE.

2026-05-22 14:47 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2025-59719.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-59719",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-10T04:57:28.019701Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T16:56:59.225Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:fortinet:fortiweb:8.0.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.6.4:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.6.3:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.6.2:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.6.1:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.6.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.9:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.8:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.7:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.6:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.5:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.4:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.3:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.2:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.1:*:*:*:*:*:*:*",
            "cpe:2.3:a:fortinet:fortiweb:7.4.0:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "product": "FortiWeb",
          "vendor": "Fortinet",
          "versions": [
            {
              "status": "affected",
              "version": "8.0.0"
            },
            {
              "lessThanOrEqual": "7.6.4",
              "status": "affected",
              "version": "7.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.4.9",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through 7.6.4, FortiWeb 7.4.0 through 7.4.9 may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "Improper access control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-20T12:39:05.692Z",
        "orgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
        "shortName": "fortinet"
      },
      "references": [
        {
          "name": "https://fortiguard.fortinet.com/psirt/FG-IR-25-647",
          "url": "https://fortiguard.fortinet.com/psirt/FG-IR-25-647"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to FortiSwitchManager version 7.2.7 or above\nUpgrade to FortiSwitchManager version 7.0.6 or above\nUpgrade to FortiProxy version 7.6.4 or above\nUpgrade to FortiProxy version 7.4.11 or above\nUpgrade to FortiProxy version 7.2.15 or above\nUpgrade to FortiProxy version 7.0.22 or above\nUpgrade to FortiOS version 7.6.4 or above\nUpgrade to FortiOS version 7.4.9 or above\nUpgrade to FortiOS version 7.2.12 or above\nUpgrade to FortiOS version 7.0.18 or above\nUpgrade to FortiWeb version 8.0.1 or above\nUpgrade to FortiWeb version 7.6.5 or above\nUpgrade to FortiWeb version 7.4.10 or above\nFortinet remediated this issue in FortiSASE version 25.3.b and hence customers do not need to perform any action.\nUpgrade to FortiPAM version 1.8.0 or above"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
    "assignerShortName": "fortinet",
    "cveId": "CVE-2025-59719",
    "datePublished": "2025-12-09T17:20:11.763Z",
    "dateReserved": "2025-09-19T04:30:39.464Z",
    "dateUpdated": "2026-03-20T12:39:05.692Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}