CVE-2025-40890 Stored Cross-Site Scripting (XSS) in Dashboards in Guardian/CMC before 25.4.0
An authenticated low-privilege user can inject JavaScript into dashboards, allowing attackers to modify data and access sensitive information when victims view the dashboard.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-40890?
CVE-2025-40890 is a medium-severity cross-site scripting vulnerability in Nozomi Networks CMC, published on 25 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A Stored Cross-Site Scripting vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter.
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-40890?
How do I fix CVE-2025-40890?
No fix has been published for CVE-2025-40890 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-40890 being exploited?
There is no known exploitation of CVE-2025-40890 in the wild and no public exploit code.
Sources
Also known as GHSA-jgq4-7gr6-r8rv.