CVE-2026-5301
Stored XSS in CoolerControl Log Viewer Allows Service Takeover
Publication date: 2026-04-08
Last updated on: 2026-04-16
Assigner: GitLab Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| coolercontrol | coolercontrold | to 4.0.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
The impact of this vulnerability includes potential unauthorized control over the CoolerControl service.
Because the vulnerability allows execution of malicious JavaScript without authentication, attackers can compromise the integrity and availability of the service.
Specifically, the CVSS score indicates low complexity to exploit (AC:L), no privileges required (PR:N), and can lead to high impact on integrity and low impact on availability.
Can you explain this vulnerability to me?
This vulnerability is a Stored Cross-Site Scripting (XSS) issue found in the log viewer component of CoolerControl's coolercontrol-ui versions prior to 4.0.0.
It allows unauthenticated attackers to inject malicious JavaScript code into log entries, which are then stored and later executed when viewed.
As a result, attackers can take over the service by exploiting this malicious script execution.