CVE-2021-30116: Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability

CVE-2021-30116 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

Kaseya VSA allows unauthenticated credential disclosure via a default download page. Attackers can obtain Agent_Guid and AgentPassword from generated configuration files to acquire a sessionId cookie, enabling authentication bypass and further attacks.

Technologies: Kaseya Server Administrator (VSA), Kaseya Virtual System. Vendors: Kaseya.

Quick answers

Is CVE-2021-30116 exploited in the wild?
Yes. CVE-2021-30116 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-30116?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Kaseya VSA before 9.5.7.
Is there a fix for CVE-2021-30116?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-30116 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-30116?
Check whether you run Kaseya Server Administrator (VSA) or Kaseya Virtual System. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Kaseya VSA before 9.5.7

Timeline

  • 2021-07-02: advisory: Vendor advisory published by Kaseya
  • 2021-07-04: disclosed: DIVD case update published
  • 2021-07-01: exploited: Exploited in the wild in July 2021 according to NVD description
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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