Home/CVE/An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS miscon
CVE

CVE-2019-16517

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS miscon

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.

CRITICAL · CVSS 9.8 EPSS 0.00224
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules4 YARA rules0
⬡

Weakness Classification

CWE-346Origin Validation Error
▤

Affected Products & Versions

1
connectwise controlall versions
⚠

Public Exploits & PoCs

2
pocblog.huntresslabs.com · validating-the-bishop-fox-findings-in-connectwise-control...blog.huntresslabs.com
pocknow.bishopfox.com · connectwise-controlknow.bishopfox.com
◈

Sigma Hunt Rules

4
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Control Panel DLL Load
producthighControl Panel Items
producthighSystem Control Panel Item Loaded From Uncommon Location
producthighEnabled User Right in AD to Control User Objects
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Jan 2020 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://know.bishopfox.com/advisoriesThird 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
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