CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
EPSS
Percentile
42.2%
Vulnerability Details:
This vulnerability allows remote attackers disclose information and/or escalate privileges under certain conditions. Authentication is required to exploit this vulnerability.
The specific flaw exists within the CallOLS function inside of the SPHashtagStoreManager class. The issue results from the lack of proper validation of user-supplied url parameter when performing web requests. An attacker can leverage this vulnerability to execute arbitrary web requests to protected resources.
Affected Vendors:
Microsoft
Affected Products:
SharePoint Server
Vendor Response:
Microsoft has issued an update to correct this vulnerability. More details can be found at:
<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1523>
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
EPSS
Percentile
42.2%