title: SQL Server Reporting Services Security Feature Bypass Vulnerability
description: <p>A security feature bypass vulnerability exists in SQL Server Reporting Services (SSRS) when the server improperly validates attachments uploaded to reports. An attacker who successfully exploited this vulnerability could upload file types that were disallowed by an administrator.</p>
<p>To exploit the vulnerability, an authenticated attacker would need to send a specially crafted request to an affected SSRS server.</p>
<p>The update addresses the vulnerability by modifying how SSRS validates attachment uploads.</p>
problem types: Security Feature Bypass
affected:
{
vendor: Microsoft
product: SQL Server 2017 Reporting Services
cpes: cpe:2.3:a:microsoft:sql_server_2017_reporting_services:-:*:*:*:*:*:*:*
platforms: Unknown
versions:
version: 14.0.0, lessThan: publication, versionType: custom, status: affected
}
{
vendor: Microsoft
product: SQL Server 2019 Reporting Services
cpes: cpe:2.3:a:microsoft:sql_server_2019_reporting_services:-:*:*:*:*:*:*:*
platforms: Unknown
versions:
version: 15.0.0, lessThan: publication, versionType: custom, status: affected
}
metrics:
format: CVSS
scenarios: GENERAL
cvssV3_1: [
version: 3.1
baseSeverity: MEDIUM
baseScore: 4.3
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
]