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CVE-2019-16517

CRITICAL
9.8
CVSS Score
Published: January 23, 2020 at 05:19 PM UTC
Updated: June 17, 2026 at 02:22 AM UTC
1 product affected across 1 vendorControl

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://know.bishopfox.com/advisories
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://know.bishopfox.com/advisories/connectwise-control
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-fox

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-346

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