CVE-2021-1271 Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability
Authenticated attackers can inject malicious scripts into the Cisco WSA management interface, allowing arbitrary code execution in the victim's browser context.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-1271?
CVE-2021-1271 is a medium-severity cross-site scripting vulnerability in Cisco Web Security Appliance (WSA), published on 20 Jan 2021. An attacker needs administrator access to exploit it, 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 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.
Weakness: CWE-79
Which versions are affected by CVE-2021-1271?
It affects 1 product.
Products include Cisco Web Security Virtual Appliance.
How do I fix CVE-2021-1271?
No fix has been published for CVE-2021-1271 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-2021-1271 being exploited?
There is no known exploitation of CVE-2021-1271 in the wild and no public exploit code.
Other vulnerabilities in Cisco Web Security Appliance (WSA)
Sources
Also known as GHSA-xp9j-q8vg-2xqp.