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Vulnerability record · CVE-2019-16512 · published 23 January 2020

CVE-2019-16512: Connectwise control cross-site scripting vulnerability

Connectwise · Control

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is stored XSS in the Appearance modifier.

4.8 CVSS 3.1 Medium EPSS 1.2% · top 32.6% CWE-79 · Cross-site scripting
4.8CVSS 3.1 base score, v2 3.5
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is stored XSS in the Appearance modifier.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34 ExploitThird Party Advisory
https://know.bishopfox.com/advisories Third Party Advisory
https://know.bishopfox.com/advisories/connectwise-control ExploitThird Party Advisory
https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox Third Party Advisory
https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-rese Third Party Advisory
https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34 ExploitThird Party Advisory
https://know.bishopfox.com/advisories Third Party Advisory
https://know.bishopfox.com/advisories/connectwise-control ExploitThird Party Advisory
https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox Third Party Advisory
https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-rese Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-25718Connectwise control improper verification of cryptographic signature vulnerabilityIn ConnectWise Control through 22.9.10032 (formerly known as ScreenConnect), after an executable file is signed, additional instructions can be added…EPSS 0.69%9.8CVE-2019-16517Connectwise control origin validation error vulnerabilityAn issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected t…EPSS 1.3%8.8CVE-2023-25719Connectwise control injection vulnerabilityConnectWise Control before 22.9.10032 (formerly known as ScreenConnect) fails to validate user-supplied parameters such as the Bin/ConnectWiseControl…EPSS 1.1%8.8CVE-2019-16513Connectwise control cross-site request forgery vulnerabilityAn issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. CSRF can be used to send API requests.EPSS 1.0%7.2CVE-2019-16514Connectwise control unrestricted file upload vulnerabilityAn issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. The server allows remote code execution. Administra…EPSS 4.2%6.5CVE-2019-16515Connectwise control vulnerabilityAn issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. Certain HTTP security headers are not used.EPSS 1.7%5.3CVE-2019-16516Connectwise control observable discrepancy vulnerabilityAn issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing…EPSS 19%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed

Source: NIST National Vulnerability Database (record CVE-2019-16512), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.