CVE-2026-21904
Cross-Site Scripting in Juniper Junos Space Enables Admin Command Execution
Publication date: 2026-04-09
Last updated on: 2026-04-09
Assigner: Juniper Networks, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| juniper_networks | junos_space | to 24.1R5_Patch_V3 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Cross-site Scripting (XSS) issue in Juniper Networks Junos Space. It occurs because the software does not properly neutralize input during web page generation, specifically in the list filter field. An attacker can inject malicious script tags into this field.
When another user visits the affected page with the injected script, the attacker can execute commands with the permissions of that user, including administrator-level permissions.
How can this vulnerability impact me? :
This vulnerability can allow an attacker to execute arbitrary commands with the permissions of the user who views the injected script. If the victim is an administrator, the attacker can gain administrative control, potentially leading to unauthorized access, data manipulation, or disruption of services.