Secure Email and Web
CVE-2024-20256: A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and…
A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager and Secure Web Appliance could allow an authenticated, remote attacker to conduct an XSS attack against a user of the interface.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.7 | See the advisory |
| Cisco Secure Web Appliance 11.8 | See the advisory |
| Cisco Secure Web Appliance 11.8 | See the advisory |
| Cisco Secure Web Appliance 11.8 | See the advisory |
| Cisco Secure Web Appliance 11.8 | See the advisory |
| Cisco Secure Web Appliance 12.0 | See the advisory |
| Cisco Secure Web Appliance 12.0 | See the advisory |
| Cisco Secure Web Appliance 12.5 | See the advisory |
| Cisco Secure Web Appliance 12.5 | See the advisory |
| Cisco Secure Web Appliance 12.5 | See the advisory |
| Cisco Secure Web Appliance 12.5 | See the advisory |
| Cisco Secure Web Appliance 12.5 | See the advisory |
| Cisco Secure Web Appliance 14.5 | See the advisory |
| Cisco Secure Web Appliance 14.5 | See the advisory |
| Cisco Secure Web Appliance 14.0 | See the advisory |
| Cisco Secure Web Appliance 14.0 | See the advisory |
| Cisco Secure Web Appliance 14.0 | See the advisory |
| Cisco Secure Web Appliance 15.0 | See the advisory |
| Cisco Secure Email and Web Manager 9.0 | See the advisory |
| Cisco Secure Email and Web Manager 11.0 | See the advisory |
| Cisco Secure Email and Web Manager 11.0 | See the advisory |
| Cisco Secure Email and Web Manager 11.5 | See the advisory |
| Cisco Secure Email and Web Manager 12.0 | See the advisory |
| Cisco Secure Email and Web Manager 12.0 | See the advisory |
| Cisco Secure Email and Web Manager 12.5 | See the advisory |
| Cisco Secure Email and Web Manager 12.5 | See the advisory |
| Cisco Secure Email and Web Manager 12.5 | See the advisory |
| Cisco Secure Email and Web Manager 12.5 | See the advisory |
| Cisco Secure Email and Web Manager 13.0 | See the advisory |
| Cisco Secure Email and Web Manager 13.6 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 13.8 | See the advisory |
| Cisco Secure Email and Web Manager 12.8 | See the advisory |
| Cisco Secure Email and Web Manager 12.8 | See the advisory |
| Cisco Secure Email and Web Manager 14.0 | See the advisory |
| Cisco Secure Email and Web Manager 14.1 | See the advisory |
| Cisco Secure Email and Web Manager 14.1 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 14.2 | See the advisory |
| Cisco Secure Email and Web Manager 14.3 | See the advisory |
| Cisco Secure Email and Web Manager 15.0 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A vulnerability in the web-based management interface of Cisco AsyncOS Software for Cisco Secure Email and Web Manager and Secure Web Appliance could allow an authenticated, remote attacker to conduct an XSS attack against a user of the interface. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected 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.
Exploitation
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.