Stored script execution via URL-filter response page
Published Jun 4, 2025 · Updated Jun 4, 2025
Stored XSS in VMware NSX 4.0.x, 4.1.x, and 4.2.x allows remote authenticated users to execute script in another user's browser. The gateway firewall stores an improperly validated URL-filtering response page and renders its injected code when another user opens the filtered website. The attacker needs permission to create or modify that response page, and exploitation runs code in the affected viewer's browser context.
Summary
What happened
Stored XSS in VMware NSX 4.0.x, 4.1.x, and 4.2.x allows remote authenticated users to execute script in another user's browser. The gateway firewall stores an improperly validated URL-filtering response page and renders its injected code when another user opens the filtered website. The attacker needs permission to create or modify that response page, and exploitation runs code in the affected viewer's browser context.
The record
- CVE
- CVE-2025-22244
- Published
- Jun 4, 2025
- Updated
- Jun 4, 2025
- Vendor
- VMware
- Product
- VMware NSX
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jun 4, 2025CVE publishedPublication date reported by the CVE source.
- Jun 4, 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.
- Affected versionversion=VMware NSX 4.0.x, VMware NSX 4.1.x, VMware NSX 4.2.x
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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