SB2023112081 - Multiple vulnerabilities in ConnectWise ScreenConnect

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Main Vulnerability Database SB2023112081

SB2023112081 - Multiple vulnerabilities in ConnectWise ScreenConnect

Published: November 20, 2023 Updated: April 21, 2026

Security Bulletin ID SB2023112081
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-47256)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to application does not properly impose security restrictions. A local user can connect to arbitrary relay servers via implicit trust of proxy settings.


2) Input validation error (CVE-ID: CVE-2023-47257)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper input validation in message handling when processing crafted messages. A remote attacker can send crafted messages to execute arbitrary code.

Exploitation requires a man-in-the-middle position.


Remediation

Install update from vendor's website.

References