Exposure of password hashes via API responses in ConnectWise PSA
In ConnectWise PSA versions older than 2025.9, a
vulnerability exists where authenticated users could gain access to sensitive
user information. Specific API requests were found to return an overly verbose
user object, which included encrypted password hashes for other users.
Authenticated users could then retrieve these hashes.
An
attacker or privileged user could then use these exposed hashes to conduct
offline brute-force or dictionary attacks. Such attacks could lead to
credential compromise, allowing unauthorized access to accounts, and
potentially privilege escalation within the system.
Exposure of password hashes via API responses in ConnectWise PSA
In ConnectWise PSA versions older than 2025.9, a
vulnerability exists where authenticated users could gain access to sensitive
user information. Specific API requests were found to return an overly verbose
user object, which included encrypted password hashes for other users.
Authenticated users could then retrieve these hashes.
An
attacker or privileged user could then use these exposed hashes to conduct
offline brute-force or dictionary attacks. Such attacks could lead to
credential compromise, allowing unauthorized access to accounts, and
potentially privilege escalation within the system.
Description: CWE-201 Insertion of Sensitive Information Into Sent Data
Metrics
Version
Base score
Base severity
Vector
3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Version:3.1
Base score:6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC ID
Description
Solutions
Cloud:
Cloud instances are automatically being updated to the latest ConnectWise PSA release.
On-Premise:
Apply the 2025.9 release patches and ensure all desktop clients are up to date.
In ConnectWise PSA versions older than 2025.9, a
vulnerability exists where authenticated users could gain access to sensitive
user information. Specific API requests were found to return an overly verbose
user object, which included encrypted password hashes for other users.
Authenticated users could then retrieve these hashes.
An
attacker or privileged user could then use these exposed hashes to conduct
offline brute-force or dictionary attacks. Such attacks could lead to
credential compromise, allowing unauthorized access to accounts, and
potentially privilege escalation within the system.