EUVD-2026-64157
GHSA-hwjf-fg7r-8gpr
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
HTML injection affecting other users requires victim page-load (UI:R); all other vendor metrics retained as consistent with description.
Primary rating from Vendor (Esri).
CVSS VectorVendor: Esri
Lifecycle Timeline
1DescriptionCVE.org
There is an HTML injection vulnerability in Esri Portal for ArcGIS versions 12.0 and prior that allows a remote, authenticated attacker to insert arbitrary HTML into the Portal for ArcGIS Home application. Users working with ArcGIS Enterprise 11.1, 11.3, 11.5 and 12.0 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.
AnalysisAI
HTML injection in Esri Portal for ArcGIS versions 11.1 through 12.0 enables a remote authenticated attacker to insert arbitrary HTML into the Portal for ArcGIS Home application, potentially exposing other portal users to malicious content. The flaw is tagged as XSS and classified under CWE-79, meaning unsanitized attacker-controlled input is rendered in the browser context of other users visiting the Home application. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privilege authenticated account on the targeted Portal for ArcGIS instance (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 3.1 score of 5.4 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) warrants scrutiny on the UI:N metric. … 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 | Esri advises all users to upgrade to the latest long-term support (LTS) release of ArcGIS Enterprise. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
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