CVE-2021-1409 Cisco Unified Communications Products Cross-Site Scripting Vulnerabilities
Unauthenticated attackers can execute arbitrary scripts or access sensitive data via XSS in Cisco Unified Communications web interfaces.
- 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-2021-1409?
CVE-2021-1409 is a medium-severity cross-site scripting vulnerability in Cisco Unified Communications Manager, published on 8 Apr 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
Multiple vulnerabilities in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against an interface user. These vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities by persuading an interface user 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.
Which versions are affected by CVE-2021-1409?
It affects 3 products.
Products include Cisco Unified Communications Manager, Cisco Unified Communications Manager Im \& Presence Service, Cisco Unity Connection.
How do I fix CVE-2021-1409?
No fix has been published for CVE-2021-1409 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-2021-1409 being exploited?
There is no known exploitation of CVE-2021-1409 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-3gj4-c93j-g529.