CVE-2025-57871Network attack vector

Administrative browser JavaScript execution via reflected input

Published Sep 29, 2025 · Updated Sep 29, 2025

Reflected XSS in Esri Portal for ArcGIS 10.9.1 through 11.4 allows remote authenticated users with administrative access to run browser JavaScript. Esri states that a crafted string is reflected into a browser, but the public advisory does not identify the affected request, parameter, or output-encoding failure. Exploitation requires administrative access and user interaction; successful execution can read or alter data available to the victim's browser session.

CVSS severity4.8
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Esri Portal for ArcGIS 10.9.1 through 11.4 allows remote authenticated users with administrative access to run browser JavaScript. Esri states that a crafted string is reflected into a browser, but the public advisory does not identify the affected request, parameter, or output-encoding failure. Exploitation requires administrative access and user interaction; successful execution can read or alter data available to the victim's browser session.

The record

CVE
CVE-2025-57871
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
Esri
Product
Portal for ArcGIS
Classifications
CWE-79, CAPEC-591, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.9.1 <=11.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Esri · Portal for ArcGISversion=10.9.1 <=11.4

Published CVSS scores

4.8EsriCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.6EsriCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:X/RL:O/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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