What is the CVSS score of CVE-2026-22154?

CVE-2026-22154 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Fortisoar Paas CVE-2026-22154

EUVD-2026-22317 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-04-14 fortinet

GHSA-p356-hfrx-f579

XSS Fortinet Fortisoar On Premise Fortisoar Paas

5.4

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Recon

Obtain valid FortiSOAR credentials
Delivery

Craft HTTP request with XSS payload
Exploit

Submit payload via vulnerable input field
Install

Payload stored in database
C2

Victim views affected page or content
Execute

Malicious script executes in victim's browser
Impact

Session hijacking or unauthorized action performed

Vulnerability Assessment

Weakness	CWE CWE-79 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Output encoding, context-aware escaping MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	The CVSS v3.1 vector (AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N) establishes a network-accessible attack with low complexity, but the privileged access requirement (PR:L) significantly restricts the threat landscape to authenticated users. The user interaction requirement (UI:R) further limits exploitability, as the victim must view a crafted page or interact with poisoned content. The moderate CVSS score of 4.6 aligns with this restricted attack surface. The impact is limited to confidentiality and integrity within the user's session scope, without availability impact. While no public exploit code or CISA KEV status has been reported, the vulnerability remains actionable for insiders or compromised accounts. This is a legitimate but lower-priority vulnerability compared to unauthenticated or zero-interaction XSS flaws.
Exploit ScenarioDerived	An authenticated FortiSOAR administrator or user with valid credentials crafts an HTTP request containing malicious JavaScript payload and submits it through a vulnerable input field (such as a workflow parameter, custom field, or configuration option). The payload is stored in the database without proper sanitization. When another user views a page, dashboard, or report that displays this stored data, the JavaScript executes in their browser, potentially stealing session tokens, triggering further actions on their behalf, or redirecting them to phishing sites.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 14, 2026

Stored cross-site scripting (XSS) in Fortinet FortiSOAR allows authenticated remote attackers to inject malicious scripts via crafted HTTP requests, affecting both PaaS and on-premise deployments across versions 7.3 through 7.6.3. The vulnerability requires user interaction to trigger the payload and results in limited confidentiality and integrity impact, with a CVSS score of 4.6 reflecting the authentication requirement and user-interaction dependency. No public exploit code or active exploitation has been confirmed at the time of analysis.

RemediationAI

Upgrade FortiSOAR on-premise to version 7.5.3 or later, or 7.6.4 or later for PaaS deployments, depending on which major version branch is deployed. Customers unable to immediately patch should restrict administrative access to trusted users only and implement network-level access controls limiting who can authenticate to FortiSOAR instances. Input validation and output encoding reviews should be performed on custom workflows or integrations that process user-supplied data. Fortinet's official guidance and patch availability confirmation is provided in advisory FG-IR-26-117 at https://fortiguard.fortinet.com/psirt/FG-IR-26-117.

Affected VersionsENISA

FortiSOAR on-premise 7.5.0 ≤7.5.2

FortiSOAR on-premise 7.4.0 ≤7.4.5

FortiSOAR PaaS 7.3.0 ≤7.3.3

FortiSOAR PaaS 7.5.0 ≤7.5.2

FortiSOAR PaaS 7.4.0 ≤7.4.5

FortiSOAR on-premise 7.6.0 ≤7.6.3

FortiSOAR PaaS 7.6.0 ≤7.6.3

FortiSOAR on-premise 7.3.0 ≤7.3.3

Affected Packages

euvd fortisoar_on_premise no fix

euvd fortisoar_paas no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability represents improper input neutralization during web page generation, classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). FortiSOAR is a security orchestration, automation, and response (SOAR) platform developed by Fortinet, available in both cloud-based PaaS and on-premise deployment models. The affected CPE strings encompass cpe:2.3:a:fortinet:fortisoar_paas and cpe:2.3:a:fortinet:fortisoar_on-premise. An attacker with valid credentials can supply specially crafted input that bypasses output encoding mechanisms, allowing malicious JavaScript to be stored in the application and executed in the context of other users' browsers when they view affected content.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVSS changed

Oct 26, 2026 - 21:23 NVD

4.6 (MEDIUM) 5.4 (MEDIUM)

CVSS changed

Apr 14, 2026 - 16:22 NVD

4.4 (MEDIUM) 4.6 (MEDIUM)

CVE Published

Apr 14, 2026 - 15:38 nvd

MEDIUM 4.6

DescriptionNVD

An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSOAR PaaS 7.6.0 through 7.6.3, FortiSOAR PaaS 7.5.0 through 7.5.2, FortiSOAR PaaS 7.4 all versions, FortiSOAR PaaS 7.3 all versions, FortiSOAR on-premise 7.6.0 through 7.6.3, FortiSOAR on-premise 7.5.0 through 7.5.2, FortiSOAR on-premise 7.4 all versions, FortiSOAR on-premise 7.3 all versions may allow an authenticated remote attacker to perform a stored cross site scripting (XSS) attack via crafted HTTP Requests.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment Fortinet

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.