Skip to main content
Press slash or control plus K to focus the search. Use the arrow keys to navigate results and press enter to open a threat.
Reconnecting to live updates…

CVE-2026-21904: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Juniper Networks Junos Space

0
Medium
VulnerabilityCVE-2026-21904cvecve-2026-21904cwe-79
Published: Thu Apr 09 2026 (04/09/2026, 21:26:09 UTC)
Source: CVE Database V5
Vendor/Project: Juniper Networks
Product: Junos Space

Description

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Juniper Networks Junos Space allows an attacker to inject script tags in the list filter field that, when visited by another user, enables the attacker to execute commands with the target's permissions, including an administrator. This issue affects all versions of Junos Space before 24.1R5 Patch V3.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 04/17/2026, 12:23:53 UTC

Technical Analysis

This vulnerability involves improper neutralization of input during web page generation in Juniper Networks Junos Space, specifically allowing script injection through the list filter field. Successful exploitation enables execution of arbitrary commands with the permissions of the user viewing the injected content, which could include administrators. The issue affects all versions before 24.1R5 Patch V3. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity, with no impact on availability. No vendor advisory or patch information is currently available.

Potential Impact

An attacker can inject malicious scripts that execute in the context of other users' sessions, potentially leading to unauthorized actions performed with the victim's privileges, including administrative commands. This can compromise confidentiality and integrity of the affected system. There is no indication of availability impact. No known active exploitation has been reported.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution with untrusted input in the list filter field and consider limiting access to Junos Space interfaces. Monitor vendor communications for updates on patches or official mitigations.

Pro Console: star threats, build custom feeds, automate alerts via Slack, email & webhooks.Upgrade to Pro

Technical Details

Data Version
5.2
Assigner Short Name
juniper
Date Reserved
2026-01-05T17:32:48.709Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 69d843721cc7ad14da3fb3f7

Added to database: 4/10/2026, 12:25:22 AM

Last enriched: 4/17/2026, 12:23:53 PM

Last updated: 5/24/2026, 8:59:52 PM

Views: 52

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

PRO

Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses