How severe is GHSA-r3w8-2c5r-h9j9?

No CVSS score has been assigned to GHSA-r3w8-2c5r-h9j9 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-r3w8-2c5r-h9j9?

GHSA-r3w8-2c5r-h9j9 affects the following packages: getkirby/cms (Packagist), getkirby/cms (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-r3w8-2c5r-h9j9?

Update getkirby/cms to 4.9.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r3w8-2c5r-h9j9 is resolved across your whole dependency graph.

How do I detect GHSA-r3w8-2c5r-h9j9 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for getkirby/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-r3w8-2c5r-h9j9 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is GHSA-r3w8-2c5r-h9j9 actively exploited in the wild?

No public exploit code has been indexed for GHSA-r3w8-2c5r-h9j9 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-r3w8-2c5r-h9j9?

GHSA-r3w8-2c5r-h9j9 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 35th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-r3w8-2c5r-h9j9?

GHSA-r3w8-2c5r-h9j9 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-r3w8-2c5r-h9j9 published, and has it been updated?

GHSA-r3w8-2c5r-h9j9 was published on June 18, 2026 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

Kirby: `pages.access` permission is not checked in the `site/find` REST API routeGHSA-r3w8-2c5r-h9j9

GHSA-r3w8-2c5r-h9j9 is a CWE-862 vulnerability in getkirby/cms. A fix is available for getkirby/cms — see the affected versions and patch details below.

Also known asCVE-2026-54005

Published

Jun 18, 2026

Updated

Sep 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-r3w8-2c5r-h9j9.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk+0.16%

Lower risk than most CVEs35th percentile — riskier than 35% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected

🐘getkirby/cms🐘getkirby/cms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

TL;DR

This vulnerability affects all Kirby sites where users of a particular role have no permission to access pages (pages.access permission is disabled). This can be due to configuration in the user blueprint(s), options in the model blueprint(s), or a combination of both settings.

It was possible to retrieve page information (including full content and metadata) for arbitrary pages via the /api/site/find route without being authorized to access the respective pages.

This vulnerability is of high severity for affected sites.

Your Kirby sites are not affected if you intend all users of your site to be able to access all pages of the site. The vulnerability can only be exploited by authenticated users that know or guess the IDs or UUIDs of pages. Write actions as well as access to draft pages are not affected by this vulnerability.

Introduction

Missing authorization allows authenticated users to perform actions they are not intended to have access to.

The effects of missing authorization can include unauthorized access to sensitive information as well as unauthorized changes to content or system information.

Affected components

The /api/site/find route allows callers to request model data for a collection of user-selected pages. This model data includes structural metadata about the page itself and its children, siblings, and files and can also be extended via a query parameter to return full page content and additional metadata. The pages to return can be queried by a list of page IDs and/or UUIDs. Draft pages are excluded from this route as it only supports querying published pages.

Impact

In affected releases, Kirby did not check whether the queried pages were accessible to the currently authenticated user.

This can lead to disclosure of sensitive information contained in inaccessible pages, including the confirmation of the existence of individual pages as well as disclosure of sensitive content fields stored in the pages. Linked children, siblings, or files were not affected by this vulnerability as they were already properly filtered by the appropriate pages.list and files.list permissions.

Because the /api/site/find route is read-only, the vulnerability does not allow malicious write access.

Patches

The problem has been patched in Kirby 4.9.4 and Kirby 5.4.4. Please update to one of these or a later version to fix the vulnerability.

In all of the mentioned releases, we added a filter ensuring that the /api/site/find route only returns pages that are accessible to the current user.

Credits

Thanks to Rizky Muhammad (@EvidentObscurity) for responsibly reporting the identified issue.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`getkirby/cms`	all versions	4.9.4`composer require getkirby/cms:^4.9.4`
🐘Packagist	`getkirby/cms`	≥ 5.0.0-alpha.1&&< 5.4.4	5.4.4`composer require getkirby/cms:^5.4.4`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for getkirby/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update getkirby/cms to 4.9.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r3w8-2c5r-h9j9 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### TL;DR This vulnerability affects all Kirby sites where users of a particular role have no permission to access pages (`pages.access` permission is disabled). This can be due to configuration in the user blueprint(s), `options` in the model blueprint(s), or a combination of both settings. It was possible to retrieve page information (including full content and metadata) for arbitrary pages via the `/api/site/find` route without being authorized to access the respective pages. **This vulnerability is of high severity for affected sites.** Your Kirby sites are *not* affected if you intend

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