Description
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.
References (5)
Core 5
Core References
Third Party Advisory x_refsource_misc
https://know.bishopfox.com/advisories
Exploit, Third Party Advisory x_refsource_misc
https://know.bishopfox.com/advisories/connectwise-control
Exploit, Third Party Advisory x_refsource_misc
https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34
Third Party Advisory x_refsource_misc
https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox
Third Party Advisory x_refsource_misc
https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-fox
Scores
CVSS v3
9.8
EPSS
0.0133
EPSS Percentile
67.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-346
Status
published
Products (1)
connectwise/control
19.3.25270.7185
Published
Jan 23, 2020
Tracked Since
Feb 18, 2026