EUVD-2026-64160
GHSA-g67q-79cc-8xw4
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Description explicitly requires a privileged attacker with content-write access, so PR:L overrides the provided PR:N; all other stored-XSS mechanics (network, low complexity, scope change) are retained.
Primary rating from Vendor (Esri).
CVSS VectorVendor: Esri
Lifecycle Timeline
1DescriptionCVE.org
There is a stored cross site scripting issue in Esri Portal for ArcGIS versions 11.5 and prior that may allow a remote, privileged attacker to inject malicious code that could potentially execute arbitrary in a victim’s browser. Users working with ArcGIS Enterprise 11.1, 11.3, and 11.5 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.
AnalysisAI
Stored XSS in Esri Portal for ArcGIS versions 11.5 and prior allows a remote attacker to inject persistent malicious scripts that execute in a victim's browser upon visiting affected portal content. Successful exploitation can yield session hijacking, credential theft, and unauthorized actions performed within a victim's authenticated portal session. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVE description, exploitation requires a 'remote, privileged attacker' to inject content - implying that write access to portal content fields is a prerequisite, which is typically gated by authentication. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | A material conflict exists between the provided CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, scored 6.1) and the CVE description, which explicitly names a 'remote, privileged attacker.' The vector carries PR:N (no authentication required), while the description implies that write access to portal content - typically gated by authentication - is a prerequisite. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to the latest ArcGIS Enterprise long-term support release per Esri's August 2026 security bulletin at https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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