CVE-2025-12776 Stored Cross-Site Scripting
Stored XSS in Commvault WebConsole Report Builder allows script execution for users with edit permissions; the component is end-of-life and unsupported.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-12776?
CVE-2025-12776 is a low-severity cross-site scripting vulnerability in Commvault WebConsole, published on 7 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Report Builder component of the application stores user input directly in a web page and displays it to other users, which raised concerns about a possible Cross-Site Scripting (XSS) attack. Proper management of this functionality helps ensure a secure and seamless user experience. Although the user input is not validated in the report creation, these scripts are not executed when the report is run by end users. The script is executed when the report is modified through the report builder by a user with edit permissions.
The Report Builder is part of the WebConsole. The WebConsole package is currently end of life, and is no longer maintained. We strongly recommend against installing or using it in any production environment. However, if you choose to install it, for example, to access functionality like the Report Builder, it must be deployed within a fully isolated network that has no access to sensitive data or internet connectivity. This is a critical security precaution, as the retired package may contain unpatched vulnerabilities and is no longer supported with updates or fixes.
Weakness: CWE-79
Which versions are affected by CVE-2025-12776?
It affects 1 product.
Products include Commvault Commvault.
How do I fix CVE-2025-12776?
No fix has been published for CVE-2025-12776 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-2025-12776 being exploited?
There is no known exploitation of CVE-2025-12776 in the wild and no public exploit code.
Other vulnerabilities in Commvault WebConsole
Sources
Also known as GHSA-gj9v-28x2-5cxr.