GHSA-v5jp-4h2p-j2p4: 
PHP vulnerability analysis and mitigation

A privilege escalation vulnerability was identified in TYPO3 CMS, tracked as GHSA-v5jp-4h2p-j2p4. The vulnerability was discovered in multiple versions of TYPO3 CMS, affecting versions 6.2.0 to 6.2.20, 7.6.0 to 7.6.5, and 8.0.0 to 8.0.1. The issue was disclosed on April 12, 2016, and has been assigned a moderate severity rating (GitHub Advisory).

The vulnerability has been assigned a CVSS v3.1 score of 6.5 (Moderate), with the following base metrics: Network attack vector, Low attack complexity, No privileges required, No user interaction needed, Unchanged scope, and Low impact on both confidentiality and integrity. The vulnerability is classified as CWE-269. The technical assessment indicates that the vulnerability could be exploited through workspace/version preview links when the admin panel is configured to be shown (GitHub Advisory).

The vulnerability allows attackers to obtain certain editing permissions within the TYPO3 CMS system when exploited successfully. The impact primarily affects the system's confidentiality and integrity at a low level, while having no direct impact on system availability (GitHub Advisory).

The vulnerability requires a valid preview link created by a privileged backend user to be exploited. The attack complexity is considered low, requiring no special privileges or user interaction for exploitation (GitHub Advisory).

The vulnerability has been patched in TYPO3 CMS versions 6.2.20, 7.6.5, and 8.0.1. Users are advised to upgrade to these patched versions to mitigate the vulnerability (GitHub Advisory).