CVE-2025-22243: VMware NSX · Stored Cross-Site Scripting (XSS) vulnerability in Manager-UI
Affects VMware NSXSource CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:HExploitation evidence
Disclosed: evidence found.
CVE published 4 Jun 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
AI-suggested
To mitigate CVE-2025-22243 effectively, European organizations should: 1) Immediately apply any available patches or updates from VMware once released, as the current information does not list patch links but VMware is expected to provide fixes promptly. 2) Restrict access to the NSX Manager UI strictly to trusted administrators and enforce strong authentication mechanisms, including multi-factor authentication, to reduce the risk of privilege misuse. 3) Implement rigorous input validation and output encoding on any custom integrations or scripts interacting with the NSX Manager UI to prevent injection of malicious content. 4) Monitor NSX Manager UI logs and network traffic for unusual activity indicative of attempted XSS exploitation or unauthorized access. 5) Educate administrators about the risks of clicking on suspicious links or interacting with untrusted content within the NSX management environment to minimize user interaction risks. 6) Consider deploying web application firewalls (WAFs) or security gateways capable of detecting and blocking XSS payloads targeting the NSX Manager UI. 7) Regularly review and audit administrative privileges to ensure the principle of least privilege is enforced, limiting the number of users who can potentially exploit this vulnerability.
Description
VMware NSX Manager UI is vulnerable to a stored Cross-Site Scripting (XSS) attack due to improper input validation.