Incorrect Authorization Affecting getkirby/cms package, versions <4.9.0>=5.0.0-alpha.1, <5.4.0
Threat Intelligence
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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- published26 Apr 2026
- disclosed24 Apr 2026
- creditoffset
Introduced: 24 Apr 2026
NewCVE-2026-40099 (opens in a new tab)How to fix?
Upgrade getkirby/cms to version 4.9.0, 5.4.0 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization via the PageRules::create process in the page rules component. An attacker can publish a page without the required status-change permission by creating it as a non-draft. This lets a user who is allowed to create pages but not change their status bypass the intended publish controls and expose content as publicly visible.
Notes
- The bypass is only relevant when page creation is exposed to authenticated users through permissions such as
pages.create. - Kirby’s advisory notes that sites are not affected if creating published pages is not considered a malicious action in that deployment.
- The vulnerable path is the page creation API, not the Panel’s normal editorial flow: the
isDraftvalue supplied at creation time can be used to request a published page directly, so deployments that only allow page creation through the Panel do not expose the same entry point.