CVE-2025-59990Network attack vector

Cross-user script execution via template-page injection

Published Oct 9, 2025 · Updated Oct 9, 2025

Reflected XSS in Juniper Networks Junos Space before 24.1R4 allows remote attackers to execute script in another user's session. The template creation pages accept attacker-supplied script tags and return them in generated web content without sufficient neutralization. Exploitation requires another user to visit an affected page; the script then acts with that user's permissions, including an administrator's.

CVSS severity5.1
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Juniper Networks Junos Space before 24.1R4 allows remote attackers to execute script in another user's session. The template creation pages accept attacker-supplied script tags and return them in generated web content without sufficient neutralization. Exploitation requires another user to visit an affected page; the script then acts with that user's permissions, including an administrator's.

The record

CVE
CVE-2025-59990
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Juniper Networks
Product
Junos Space
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <24.1R4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos Spaceversion=0 <24.1R4

Published CVSS scores

6.1Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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