CVE-2025-57877Network attack vector

Browser script execution via reflected crafted string

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 to execute JavaScript in a browser. Esri has not published the affected request parameter or page; the portal reflects a crafted administrator-supplied string into browser content without safe neutralization. Administrative access is required to supply the string, and another user must open the affected response, exposing browser-accessible data and actions.

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 to execute JavaScript in a browser. Esri has not published the affected request parameter or page; the portal reflects a crafted administrator-supplied string into browser content without safe neutralization. Administrative access is required to supply the string, and another user must open the affected response, exposing browser-accessible data and actions.

The record

CVE
CVE-2025-57877
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
Esri
Product
Portal for ArcGIS
Classifications
CWE-79, CAPEC-591, T1203
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

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

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
T1203Exploitation for Client Execution

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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