Description
Drupal 9.3 implemented a generic entity access API for entity revisions. However, this API was not completely integrated with existing permissions, resulting in some possible access bypass for users who have access to use revisions of content generally, but who do not have access to individual items of node and media content. This vulnerability only affects sites using Drupal's revision system.
Remediation
References
Related Vulnerabilities
PostgreSQL Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2018-1053)
MediaWiki Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2013-1818)
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