CVE-2020-3346 Cisco Unified Communications Manager Cross-Site Scripting Vulnerability
Unauthenticated remote attackers can execute arbitrary scripts or access sensitive data via XSS in the Cisco Unified Communications Manager web UI.
- 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-2020-3346?
CVE-2020-3346 is a medium-severity cross-site scripting vulnerability in Cisco Unified Communications Manager, published on 17 Aug 2020. 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 UI of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability exists because the web UI does not properly validate user-supplied input. 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.
Weakness: CWE-79
Which versions are affected by CVE-2020-3346?
It affects 1 product.
Products include Cisco Unified Communications Manager.
How do I fix CVE-2020-3346?
No fix has been published for CVE-2020-3346 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-2020-3346 being exploited?
There is no known exploitation of CVE-2020-3346 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Communications Manager
- CVE-2026-20230 Cisco Unified Communications Manager Server-Side Request Forgery (SSRF)
- CVE-2026-20045 Cisco Unified Communications Products Code Injection
- CVE-2025-20309 Cisco Unified Communications Manager Static SSH Credentials Vulnerability
- CVE-2011-1643 Information disclosure in n/a
- CVE-2024-20253 Deserialization in Cisco Packaged Contact Center Enterprise
Sources
Also known as GHSA-v5vq-g662-p4fr.