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

Source: https://junglewise.ai/threats/cve-2021-30116-kaseya-virtual-system-server-administrator-vsa-information  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

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)](https://junglewise.ai/threats/technologies/server-administrator-vsa), [Kaseya Virtual System](https://junglewise.ai/threats/technologies/virtual-system). Vendors: [Kaseya](https://junglewise.ai/threats/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

## Related threats

- [Kaseya VSA SQL Injection Vulnerability](https://junglewise.ai/threats/cve-2017-18362-kaseya-vsa-sql-injection-vulnerability)
- [Kaseya VSA Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2018-20753-kaseya-vsa-remote-code-execution-vulnerability)