CVE-2025-55104Network attack vector

Browser script execution via stored site content

Published Aug 21, 2025 · Updated Aug 21, 2025

Stored XSS in Esri ArcGIS Enterprise Sites 10.9.1 through 11.4 allows remote authenticated users to execute JavaScript in a visitor's browser. The site editor stores attacker-supplied content without neutralizing an embedded script, which later runs when another user opens the affected site. The attacker must be able to create or edit a site, and exploitation requires a user to trigger the stored payload; execution is confined to that user's browser context.

CVSS severity4.8
Medium
EPSS probability0.19%
Next 30 days · Sep 17, 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 visitor's browser. The site editor stores attacker-supplied content without neutralizing an embedded script, which later runs when another user opens the affected site. The attacker must be able to create or edit a site, and exploitation requires a user to trigger the stored payload; execution is confined to that user's browser context.

The record

CVE
CVE-2025-55104
Published
Aug 21, 2025
Updated
Aug 21, 2025
Vendor
Esri
Product
ArcGIS Enterprise Sites
Classifications
CWE-79, CAPEC-63, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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

4.8EsriCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1190Exploit Public-Facing Application

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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