CVE-2025-59991Network attack vector

Cross-user command execution via unneutralized script tags

Published Oct 9, 2025 · Updated Oct 9, 2025

Cross-site scripting in Juniper Networks Junos Space before 24.1R4 allows remote attackers to run script with a visiting user's permissions. Device Management pages accept attacker-supplied script tags and render them without neutralization when another user opens the affected content. Exploitation requires the target to visit crafted content; the resulting script can act with that user's permissions, including administrator permissions.

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

Cross-site scripting in Juniper Networks Junos Space before 24.1R4 allows remote attackers to run script with a visiting user's permissions. Device Management pages accept attacker-supplied script tags and render them without neutralization when another user opens the affected content. Exploitation requires the target to visit crafted content; the resulting script can act with that user's permissions, including administrator permissions.

The record

CVE
CVE-2025-59991
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Juniper Networks
Product
Junos Space
Classifications
CWE-79, T1189
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 Networks, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1Juniper Networks, Inc.CVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1189Drive-by Compromise

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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