CVE-2020-3431 Cisco Small Business RV Series Routers Cross-Site Scripting Vulnerability
An unauthenticated remote attacker can execute arbitrary script code or access sensitive information by tricking a user into clicking a crafted link in the router's web interface.
- 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-2020-3431?
CVE-2020-3431 is a medium-severity cross-site scripting vulnerability in Cisco Small Business RV Series Router Firmware, published on 18 Nov 2024. 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 Small Business RV042 Dual WAN VPN Routers and Cisco Small Business RV042G Dual Gigabit WAN VPN Routers could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of the affected software. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. 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.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-79
Which versions are affected by CVE-2020-3431?
How do I fix CVE-2020-3431?
No fix has been published for CVE-2020-3431 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-2020-3431 being exploited?
There is no known exploitation of CVE-2020-3431 in the wild and no public exploit code.
Sources
Also known as GHSA-x469-9qwg-89hw.