NN-2025:11-01
Stored Cross-Site Scripting (XSS) in Dashboards in Guardian/CMC before 25.4.0
| Advisory ID | NN-2025:11-01 |
|---|---|
| Topic | Stored Cross-Site Scripting (XSS) in Dashboards in Guardian/CMC before 25.4.0 |
| CWE Impact | CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') |
| Issue date | 2025-11-25 |
| Affects | Guardian, CMC < v25.4.0 |
| CVE Name(s) | CVE-2025-40890 |
| CVSS Details | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:H |
| CVSS Score | 5.9 (CVSS v4.0) 7.9 (CVSS v3.1) |
| CVE Risk Level | Medium (CVSS v4.0) High (CVSS v3.1) |
| Risk Level for Nozomi customers | Medium |
Summary
A Stored Cross-Site Scripting vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter.
Impact
An authenticated low-privilege user can craft a malicious dashboard containing a JavaScript payload and share it with victim users, or a victim can be socially engineered to import a malicious dashboard template. When the victim views or imports the dashboard, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.
Affected Products
Guardian, CMC < v25.4.0
Workarounds and Mitigations
Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones.
Solutions
Upgrade to v25.4.0 or later.
Modification History
Related Links
Acknowledgements
We thank the following parties for their efforts:
- ENCS for finding this issue during a VAPT testing session commissioned by one of our customers
Contact
Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com.More contact details on the PSIRT page.