CVE-2025-55103: Esri Portal for ArcGIS Enterprise Sites · Cross-site Scripting
Affects Esri Portal for ArcGIS Enterprise SitesSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 21 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Esri Portal for ArcGIS Enterprise Sites | Affected
| Fixed in– |
AI-suggested
To mitigate this vulnerability, European organizations should: 1) Immediately review and restrict high-privilege access to the Portal, ensuring only necessary personnel have such rights. 2) Implement strict input validation and sanitization controls on all user-uploaded files and content within the Portal environment. 3) Monitor and audit Portal logs for unusual file uploads or script execution attempts. 4) Educate users with high privileges about the risks of loading untrusted files and enforce policies to avoid opening suspicious content. 5) Apply any available vendor patches or updates as soon as they are released by Esri. 6) Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block XSS payloads targeting the Portal. 7) Conduct regular security assessments and penetration testing focused on the Portal to identify and remediate similar input validation issues proactively. 8) Employ network segmentation to limit the Portal’s access to critical backend systems, reducing potential lateral movement if compromised.
Description
There is a stored Cross-site Scripting vulnerability in Esri Portal for ArcGIS Enterprise Sites versions 10.9.1 – 11.4 that may allow a remote, authenticated attacker to inject malicious a file with an embedded xss script which when loaded could potentially execute arbitrary JavaScript code in the victim’s browser. The privileges required to execute this attack are high. The attack could disclose a privileged token which may result in the attacker gaining full control of the Portal.