Palo Alto Networks Security Advisories / CVE-2017-16878

CVE-2017-16878 Cross Site Scripting in PAN-OS Captive Portal

Severity 6.1 · MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Confidentiality Impact LOW
Privileges Required NONE
Integrity Impact LOW
User Interaction REQUIRED
Availability Impact NONE


A vulnerability exists in PAN-OS Captive Portal that could allow for a cross-site scripting (XSS) attack to be performed against clients viewing the captive portal page when configured in a certain way. (Ref # PAN-85238 / CVE-2017-16878)

Successful exploitation of this issue may allow an attacker to inject arbitrary javascript or HTML.

This issue affects PAN-OS 8.0.6-h3 and earlier.

Product Status

PAN-OS 8.0<= 8.0.6-h3>= 8.0.7


CVSSv3.1 Base Score:6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')


PAN-OS 8.0.7 and later.

Workarounds and Mitigations

Customers not using the Captive Portal function within PAN-OS are not impacted by this vulnerability.


Palo Alto Networks would like to thank Shaun Wheelhouse for reporting this issue to us.
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