Vulnerability · Published May 6, 2021 · Assigned by cisco

CVE-2021-1490Cisco Web Security Appliance Cross-Site Scripting Vulnerability

Medium 4.7

In plain English

A medium-severity cross-site scripting in Cisco Web Security Appliance (WSA) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)0.7%top 46.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface of an affected device. This vulnerability is due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit this vulnerability by persuading a user to retrieve a crafted file that contains malicious payload and upload it to the affected device. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Web Security Appliance (WSA)	n/a

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

References

20210505 Cisco Web Security Appliance Cross-Site Scripting Vulnerability vendor-advisory, x_refsource_CISCO