CVE-2025-20240
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-24

Last updated on: 2025-09-26

Assigner: Cisco Systems, Inc.

Description
A vulnerability in the Web Authentication feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting attack (XSS) on an affected device. This vulnerability is due to improper sanitization of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to execute a reflected XSS attack and steal user cookies from the affected device.
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Meta Information
Published
2025-09-24
Last Modified
2025-09-26
Generated
2026-06-16
AI Q&A
2025-09-24
EPSS Evaluated
2026-06-15
NVD
CVE-2025-20240
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cisco ios_xe *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-692 The product uses a denylist-based protection mechanism to defend against XSS attacks, but the denylist is incomplete, allowing XSS variants to succeed.
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Executive Summary

This vulnerability is a reflected cross-site scripting (XSS) flaw in the web UI of Cisco IOS XE Software. It occurs because the software does not properly sanitize user-supplied input. An attacker can exploit this by tricking a user into clicking a malicious link, which then allows the attacker to execute a reflected XSS attack and potentially steal the user's cookies from the affected device.

Impact Analysis

If exploited, this vulnerability can allow an attacker to execute a reflected XSS attack on the device's web UI, potentially stealing user cookies. This could lead to unauthorized access to user sessions or sensitive information, compromising the security of the affected device and its users.

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