CVE-2021-3619: Rapid7 Velociraptor Notebooks Authenticated Persistent XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-22 · updated 2026-06-17
Weakness: CWE-79

Description

Rapid7 Velociraptor 0.5.9 and prior is vulnerable to a post-authentication persistent cross-site scripting (XSS) issue, where an authenticated user could abuse MIME filetype sniffing to embed executable code on a malicious upload. This issue was fixed in version 0.6.0. Note that login rights to Velociraptor is nearly always reserved for trusted and verified users with IT security backgrounds.

Affected products

Rapid7 Velociraptor: before 0.6.0 — fixed in 0.6.0

How to fix

Upgrade to a fixed version: Rapid7 Velociraptor 0.6.0. Check the vendor advisory for mitigations.

References

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