CVE-2025-59991: Juniper Networks Junos Space · XSS or 'Cross-site Scripting'
Affects Juniper Networks Junos SpaceSource CVE Database V5
Not known to be exploited · CVSS 6.1 Medium.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Juniper Networks Junos Space | Affected
| Fixed in– |
AI-suggested
Organizations should prioritize upgrading Junos Space to version 24.1R4 or later once available to remediate this vulnerability. Until patches are applied, implement strict input validation and output encoding on any user-supplied data displayed in Device Management pages to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts within the Junos Space web interface. Limit access to the Junos Space management interface to trusted networks and users, using network segmentation and VPNs where possible. Educate users, especially administrators, about the risks of clicking unknown or suspicious links that could trigger XSS attacks. Monitor logs and network traffic for unusual activity that may indicate exploitation attempts. Consider deploying web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting Junos Space. Regularly review and audit user permissions to minimize the impact of compromised accounts.
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 Device Management pages that, when visited by another user, enable the attacker to execute commands with the target's permissions, including an administrator. This issue affects all versions of Junos Space before 24.1R4.