CVE-2026-28782
MEDIUM
GHSA-jxm3-pmm2-9gf6
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
4Description
Craft is a content management system (CMS). Prior to 5.9.0-beta.1 and 4.17.0-beta.1, the "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request. Furthermore, this vulnerability allows duplicating other users' entries by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system. This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.
Analysis
Craft CMS prior to versions 5.9.0-beta.1 and 4.17.0-beta.1 fails to properly authorize the "Duplicate" entry action, allowing authenticated users to bypass UI restrictions and duplicate entries via direct requests. An attacker with minimal "View Entries" permissions can exploit predictable, incremental Entry IDs to brute-force and duplicate other users' restricted content, gaining unauthorized access to sensitive data. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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External POC / Exploit Code
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