CVE-2019-16517

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.

• CWE-346

• https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34Exploit, Third Party Advisory
• https://know.bishopfox.com/advisoriesThird Party Advisory
• https://know.bishopfox.com/advisories/connectwise-controlExploit, Third Party Advisory
• https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-foxThird Party Advisory
• https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-foxThird Party Advisory
• https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34Exploit, Third Party Advisory
• https://know.bishopfox.com/advisoriesThird Party Advisory
• https://know.bishopfox.com/advisories/connectwise-controlExploit, Third Party Advisory
• https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-foxThird Party Advisory
• https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-foxThird Party Advisory

Published

Jan 23, 2020

Last Modified

Jun 17, 2026

Status

Modified

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