CVE-2025-57871: Esri Portal for ArcGIS · Cross-site Scripting
Affects Esri Portal for ArcGISSource 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 29 Sep 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 | Affected
| Fixed in– |
AI-suggested
To mitigate this vulnerability, European organizations should: 1) Apply patches or updates from Esri as soon as they become available, even though none are currently listed, monitoring Esri advisories closely. 2) Implement strict input validation and output encoding on all user-supplied data within the Portal for ArcGIS environment, particularly for administrative interfaces. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the portal. 4) Limit administrative access to trusted personnel and enforce multi-factor authentication to reduce the risk of compromised credentials. 5) Conduct regular security awareness training for GIS administrators to recognize and avoid phishing or social engineering attempts involving malicious URLs. 6) Monitor logs for unusual administrative activity or repeated failed attempts to inject scripts. 7) Consider network segmentation to isolate the Portal for ArcGIS from less trusted networks, reducing exposure to external threats.
Description
There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS 11.4 and below that may allow a remote authenticated attacker with administrative access to supply a crafted string which would execute arbitrary JavaScript code in the browser.