CVE-2026-33520: BUG-000185167 - ArcGIS Server has a security vulnerability.
There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS versions 12.1 and prior which may allow a remote, unauthenticated attacker to create a crafted link which when clicked could potentially execute arbitrary JavaScript code in the victim’s browser. A patch is provided for impacted ArcGIS Server software in General Availability and Extended support status, which includes versions 11.5. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ArcGIS Serverto a version that resolves this vulnerability.Fixed in 11.5
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
An attacker must create a crafted link and persuade a victim to click it. The attacker does not need to be authenticated, and successful exploitation can execute arbitrary JavaScript in the victim's browser.
Which deployments are affected and eligible for patches?
Esri Portal for ArcGIS versions 12.1 and earlier are affected. Patches are provided for impacted ArcGIS Server software in General Availability or Extended Support; mature or retired versions are not patch eligible.
What should organizations running an unlisted or unsupported version do?
Upgrade to a supported version and apply the available patch. The provided information states that unlisted versions should be upgraded because mature and retired versions are not eligible for patches.