CVE-2023-4910 is a vulnerability identified in the Red Hat 3scale API Management Platform 2, specifically within the 3Scale Admin Portal. The flaw arises from improper handling of browser caching mechanisms on the personal tokens page. When a user logs out from this page and subsequently presses the browser's back button, the tokens page is served from the browser cache instead of being properly invalidated or redirected. This behavior exposes sensitive personal tokens to anyone with access to the browser session after logout, potentially allowing unauthorized access to API credentials. The vulnerability is classified under the category of 'Exposure of Resource to Wrong Sphere,' indicating that sensitive information is accessible beyond the intended security boundary. The CVSS v3.1 base score is 5.5, with vector metrics AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, meaning the attack requires local access with low privileges, no user interaction, and impacts confidentiality only. No integrity or availability impacts are noted. There are no known exploits in the wild, and no patches or updates are explicitly referenced in the provided data. The issue highlights a common web security concern where sensitive pages are cached by browsers post-logout, undermining session termination and exposing credentials.

For European organizations, the primary impact of CVE-2023-4910 is the potential unauthorized disclosure of API personal tokens, which can lead to unauthorized API access and data leakage. This compromises confidentiality but does not affect data integrity or system availability. Organizations relying on Red Hat 3scale for managing APIs, especially those handling sensitive or regulated data, face increased risk of credential exposure if users share or lose control of their devices. This is particularly critical in sectors such as finance, healthcare, and government, where API security is paramount. The vulnerability could facilitate lateral movement or unauthorized API calls if tokens are accessed by malicious actors. However, exploitation requires local access to the user's browser session, limiting remote attack feasibility. The lack of known exploits reduces immediate risk but does not eliminate the need for remediation. Failure to address this issue could lead to compliance violations under GDPR or other data protection regulations if personal or sensitive data is exposed through compromised APIs.

To mitigate CVE-2023-4910, European organizations should implement the following specific measures: 1) Configure the 3Scale Admin Portal and associated web servers to include HTTP headers that prevent caching of sensitive pages, such as 'Cache-Control: no-store, no-cache, must-revalidate' and 'Pragma: no-cache'. 2) Ensure that logout processes explicitly invalidate sessions and tokens server-side and redirect users to a non-sensitive page rather than allowing cached content to be displayed. 3) Educate users to close browser windows or clear cache after logout, especially on shared or public devices. 4) Employ browser security policies or extensions that enforce strict cache control for sensitive applications. 5) Monitor API token usage for anomalies that might indicate token leakage or misuse. 6) Keep the Red Hat 3scale platform updated with the latest security patches once available. 7) Consider implementing multi-factor authentication (MFA) for API access to reduce the impact of token exposure. These steps go beyond generic advice by focusing on cache control headers, logout flow improvements, and user behavior to specifically address the root cause of the vulnerability.