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CVE-2026-28781GHSA-2XFC-G69J-X2MP

Craft Affected by Entries Authorship Spoofing via Mass Assignment

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.9.0-beta.1, 4.17.0-beta.1
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with "Create Entries" permission can inject the authorIds[] (or authorId) parameter into the POST request, which the backend processes without verifying if the current user is authorized to assign authorship to others. Normally, this field is not present in the request for users without the necessary permissions. By manually adding this parameter, an attacker can attribute the new entry to any user, including Admins. This effectively "spoofs" the authorship. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • craftcms cms

    From 5.0.0-RC1 · fixed in 5.9.0-beta.1; From 4.0.0-RC1 · fixed in 4.17.0-beta.1

  • craftcms/cmsPackagist

    From 5.0.0-RC1 · fixed in 5.9.0-beta.1

  • craftcms/cmsPackagist

    From 4.0.0-RC1 · fixed in 4.17.0-beta.1

References 3

GitHub · craftcms/cms