Vulnerability Name:

CVE-2021-1271 (CCN-195313)

Assigned:2020-11-13
Published:2021-01-20
Updated:2021-01-27
Summary:A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface of an affected device. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by inserting malicious data into a specific data field in an affected interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface.
CVSS v3 Severity:4.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
4.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:3.5 Low (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
4.7 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:M/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Multiple_Instances
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2021-1271

Source: XF
Type: UNKNOWN
cisco-cve20211271-xss(195313)

Source: CCN
Type: Cisco Security Advisory cisco-sa-wsa-xss-RuB5WGqL
Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability

Source: CISCO
Type: Vendor Advisory
20210120 Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:web_security_virtual_appliance:*:*:*:*:*:*:*:* (Version < 12.5.1)

    • Configuration CCN 1:
  • cpe:/a:cisco:web_security_appliance:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco web security virtual appliance *
    cisco web security appliance *