Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting craftcms/cms package, versions >=4.0.0-RC1, <4.17.0-beta.1>=5.0.0-RC1, <5.9.0-beta.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Mar 2026
- disclosed3 Mar 2026
- creditHesham
Introduced: 3 Mar 2026
NewCVE-2026-28781 (opens in a new tab)How to fix?
Upgrade craftcms/cms to version 4.17.0-beta.1, 5.9.0-beta.2 or higher.
Overview
craftcms/cms is a content management system.
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via the authorId parameter during the entry creation. An attacker can assign authorship of new entries to arbitrary users, including administrators, by injecting the authorIds[] or authorId parameter into the POST request. This can result in misleading attribution of content and potential abuse of trust.