Cisco Web Security Appliance XSS (cisco-sa-wsa-xss-mVjOWchB)

medium Nessus Plugin ID 149450
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco Web Security Appliance is affected by a cross-site scripting (XSS) vulnerability due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user's browser session. Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvv18456, CSCvv26363, CSCvx74586

See Also

http://www.nessus.org/u?0b504e08

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv18456

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv26363

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx74586

Plugin Details

Severity: Medium

ID: 149450

File Name: cisco-sa-wsa-xss-mVjOWchB.nasl

Version: 1.11

Type: combined

Family: CISCO

Published: 5/13/2021

Updated: 6/3/2021

Dependencies: cisco_wsa_version.nasl

Risk Information

CVSS Score Source: CVE-2021-1490

VPR

Risk Factor: Low

Score: 3

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:cisco:web_security_appliance, cpe:/a:cisco:web_security_appliance, cpe:/o:cisco:web_security_appliance, cpe:/o:cisco:asyncos

Required KB Items: Host/AsyncOS/Cisco Web Security Appliance/DisplayVersion, Host/AsyncOS/Cisco Web Security Appliance/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/5/2021

Vulnerability Publication Date: 5/5/2021

Reference Information

CVE: CVE-2021-1490

CISCO-BUG-ID: CSCvv18456, CSCvv26363, CSCvx74586

CISCO-SA: cisco-sa-wsa-xss-mVjOWchB

IAVA: 2021-A-0238-S

CWE: 79