CVE-2019-16517
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185....
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.
- Record
CVE-2019-16517- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-346
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.
- Record
CVE-2019-16517- Updated
- 2026-11-02
EUVDEUVD-2019-7194 No score
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.
- Record
EUVD-2019-7194- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7c2v-cqrg-3pf6 No score
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185....
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.
- Record
GHSA-7c2v-cqrg-3pf6- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-16517 is a critical vulnerability (CVSS 9.8) in Connectwise Control, published January 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.34%, the 71st percentile. No source names a fixed version.
References
know.bishopfox.com/advisories
blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34
crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox
nvd.nist.gov/vuln/detail/CVE-2019-16517
github.com/advisories/GHSA-7c2v-cqrg-3pf6