What is the CVSS score of CVE-2025-57877?

CVE-2025-57877 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2025-57877?

During next maintenance window: Identify affected systems and apply vendor patches when convenient. Verify Content-Security-Policy and output encoding.

Portal For Arcgis CVE-2025-57877

MEDIUM

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

2025-09-29 psirt@esri.com

XSS Portal For Arcgis Esri

4.8

CVSS 3.1 · Vendor: esri

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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	CVSS score of 4.8 (MEDIUM). Attack characteristics: network attack vector, low complexity, high privileges required, user interaction required. EPSS exploitation probability: 0.03%.
Exploit ScenarioDerived	A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.

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

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS 11.4 and below that may allow a remote authenticated attacker with administrative access to supply a crafted string. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS 11.4 and below that may allow a remote authenticated attacker with administrative access to supply a crafted string which would execute arbitrary JavaScript code in the browser. Affected products include: Esri Portal For Arcgis.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (esri) PRIMARY 4.8 MEDIUM

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

Primary rating from Vendor (esri) · only source for this CVE.

CVSS VectorVendor: esri

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch released

Mar 28, 2026 - 19:14 nvd

Patch available

CVE Published

Sep 29, 2025 - 19:15 nvd

MEDIUM 4.8

DescriptionCVE.org

Executive ViewAI

Why It Matters

Organizations using There should be aware of moderate risk from CVE-2025-57877, a cross-site scripting vulnerability rated CVSS 4.8. Attackers could inject scripts to steal sessions or perform actions as authenticated users. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.

Threat Intelligence Overview

EPSS Score

0.0%

Top 92% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 Yes

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.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +24

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)CVE.org

cpe:2.3:a:esri:portal_for_arcgis:10.9.1:-:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:10.9.1:security_2025_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:10.9.1:security_2025_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.0:*:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.1:-:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2024_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2024_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2025_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2025_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.2:-:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.2:security_2024_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.2:security_2024_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.2:security_2025_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.2:security_2025_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.3:-:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2025_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2025_update2:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.4:-:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.4:security_2025_update1:*:*:*:*:*:*

cpe:2.3:a:esri:portal_for_arcgis:11.4:security_2025_update2:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/portal-for-arcgis-security-2025-update-3-patch

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GitHub PoC

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