CVE-2021-1490 Cisco Web Security Appliance Cross-Site Scripting Vulnerability
Unauthenticated attackers can execute arbitrary scripts or access sensitive data via XSS in the Cisco WSA management interface by tricking users into uploading crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-1490?
CVE-2021-1490 is a medium-severity cross-site scripting vulnerability in Cisco Web Security Appliance, published on 6 May 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2021-1490?
It affects 1 product.
Products include Cisco Web Security Appliance.
How do I fix CVE-2021-1490?
No fix has been published for CVE-2021-1490 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-1490 being exploited?
There is no known exploitation of CVE-2021-1490 in the wild and no public exploit code.
Other vulnerabilities in Cisco Web Security Appliance
Sources
Also known as GHSA-m984-c49v-3884.