CVE-2020-3157

CVE-2020-3157 describes a cross-site scripting (XSS) vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE), stemming from insufficient input validation. An authenticated, remote attacker with write permissions could exploit this by crafting and saving a malicious configuration. This could lead to arbitrary script execution in the context of the affected interface or access to sensitive browser-based information when an administrator views the configuration. The vulnerability has a CVSS score of 5.4 (Medium), indicating a network-based attack requiring low privileges and user interaction, with low impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.