CVE-2025-55103Network attack vector

Privileged token theft via stored file script

Published Aug 21, 2025 · Updated Sep 9, 2025

Stored XSS in Esri ArcGIS Enterprise Sites 10.9.1 through 11.4 allows remote authenticated users to execute JavaScript in a victim's browser. A highly privileged user can upload a malicious file containing an embedded script that Sites stores and later renders when another user loads it. Victim interaction is required; the script can disclose a privileged token and enable full control of the Portal.

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

Stored XSS in Esri ArcGIS Enterprise Sites 10.9.1 through 11.4 allows remote authenticated users to execute JavaScript in a victim's browser. A highly privileged user can upload a malicious file containing an embedded script that Sites stores and later renders when another user loads it. Victim interaction is required; the script can disclose a privileged token and enable full control of the Portal.

The record

CVE
CVE-2025-55103
Published
Aug 21, 2025
Updated
Sep 9, 2025
Vendor
Esri
Product
ArcGIS Enterprise Sites
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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 privilegesauthenticated

What is affected?

Esri · ArcGIS Enterprise Sitesversion=10.9.1 <=11.4

Published CVSS scores

4.8Environmental Systems Research Institute, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.6Environmental Systems Research Institute, Inc.CVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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