Vulnerability-Lookup

CVE-2026-42069 (GCVE-0-2026-42069)

Vulnerability from cvelistv5 – Published: 2026-05-09 03:35 – Updated: 2026-05-12 18:31

Title

Kirby: Read access to site, user and role information is not gated by permissions

Summary

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, read access to site, user and role information is not gated by permissions. This issue has been patched in versions 4.9.0 and 5.4.0.

Severity ?

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CWE

CWE-862 - Missing Authorization

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/getkirby/kirby/security/adviso…	x_refsource_CONFIRM
https://github.com/getkirby/kirby/releases/tag/4.9.0	x_refsource_MISC
https://github.com/getkirby/kirby/releases/tag/5.4.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
getkirby	kirby	Affected: < 4.9.0 Affected: >= 5.0.0, < 5.4.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-42069

Vulnerability from fkie_nvd - Published: 2026-05-09 04:16 - Updated: 2026-05-18 13:00

Severity ?

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/getkirby/kirby/releases/tag/4.9.0	Release Notes
security-advisories@github.com	https://github.com/getkirby/kirby/releases/tag/5.4.0	Release Notes
security-advisories@github.com	https://github.com/getkirby/kirby/security/advisories/GHSA-2h7v-4372-f6x2	Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	getkirby	kirby	*
	getkirby	kirby	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1BB5394F-37F9-4A53-9CE7-79548F674886",
              "versionEndExcluding": "4.9.0",
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    }
  ],
  "id": "CVE-2026-42069",
  "lastModified": "2026-05-18T13:00:59.960",
  "metrics": {
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}

GHSA-2H7V-4372-F6X2

Vulnerability from github – Published: 2026-05-04 19:50 – Updated: 2026-05-13 13:38

Summary

Kirby CMS's read access to site, user and role information is not gated by permissions

Details

TL;DR

This vulnerability affects all Kirby sites that might have potential attackers in the group of authenticated Panel users.

This vulnerability is of high severity for affected sites.

Sites using Kirby are not affected if they intend all users of the site to be able to list and access the site model and all users and roles, including the content stored within these models. Write actions are not affected by this vulnerability as they were gated by permissions before.

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.

Impact

Kirby's user permissions control which user role is allowed to perform specific actions to content models in the CMS. These permissions are defined for each role in the user blueprint (site/blueprints/users/...). It is also possible to customize the permissions for each target model in the model blueprints (such as in site/blueprints/pages/...) using the options feature. The permissions and options together control the authorization of user actions.

In affected releases, Kirby did not provide permission settings that control the access to the site model as well as to users and user roles. If the site developer disabled all permissions via the wildcard "*": false setting, this only disabled the actions that were explicitly gated by existing permissions.

To be specific, the following permissions were missing in affected releases and have been added in the patches:

site.access
user.access and users.access (for the own user and other users respectively)
user.list and users.list (for the own user and other users respectively)

Access to role information such as the list of existing roles, their names and descriptions as well as their configured permissions were also not gated by user-based permissions.

Patches

The problem has been patched in Kirby 4.9.0 and Kirby 5.4.0. Please update to one of these or a later version to fix the vulnerability.

In all of the mentioned releases, Kirby has added the missing permissions that are listed in the "Impact" section. The user.access and users.access permissions also take effect on the access to the user's own role and to other roles respectively.

Credits

Kirby thanks @HuajiHD for responsibly reporting the identified issue.

Severity ?

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.8.0"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "getkirby/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.3.3"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "getkirby/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42069"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-04T19:50:24Z",
    "nvd_published_at": "2026-05-09T04:16:22Z",
    "severity": "HIGH"
  },
  "details": "### TL;DR\n\nThis vulnerability affects all Kirby sites that might have potential attackers in the group of authenticated Panel users.\n\n**This vulnerability is of high severity for affected sites.**\n\nSites using Kirby are *not* affected if they intend all users of the site to be able to list and access the site model and all users and roles, including the content stored within these models. Write actions are *not* affected by this vulnerability as they were gated by permissions before.\n\n----\n\n### Introduction\n\nMissing authorization allows authenticated users to perform actions they are not intended to have access to.\n\nThe effects of missing authorization can include unauthorized access to sensitive information as well as unauthorized changes to content or system information.\n\n### Impact\n\nKirby\u0027s user permissions control which user role is allowed to perform specific actions to content models in the CMS. These permissions are defined for each role in the user blueprint (`site/blueprints/users/...`). It is also possible to customize the permissions for each target model in the model blueprints (such as in `site/blueprints/pages/...`) using the `options` feature. The permissions and options together control the authorization of user actions.\n\nIn affected releases, Kirby did not provide permission settings that control the access to the site model as well as to users and user roles. If the site developer disabled all permissions via the wildcard `\"*\": false` setting, this only disabled the actions that were explicitly gated by existing permissions.\n\nTo be specific, the following permissions were missing in affected releases and have been added in the patches:\n\n- `site.access`\n- `user.access` and `users.access` (for the own user and other users respectively)\n- `user.list` and `users.list` (for the own user and other users respectively)\n\nAccess to role information such as the list of existing roles, their names and descriptions as well as their configured permissions were also not gated by user-based permissions.\n\n### Patches\n\nThe problem has been patched in [Kirby 4.9.0](https://github.com/getkirby/kirby/releases/tag/4.9.0) and [Kirby 5.4.0](https://github.com/getkirby/kirby/releases/tag/5.4.0). Please update to one of these or a [later version](https://github.com/getkirby/kirby/releases) to fix the vulnerability.\n\nIn all of the mentioned releases, Kirby has added the missing permissions that are listed in the \"Impact\" section. The `user.access` and `users.access` permissions also take effect on the access to the user\u0027s own role and to other roles respectively.\n\n### Credits\n\nKirby thanks @HuajiHD for responsibly reporting the identified issue.",
  "id": "GHSA-2h7v-4372-f6x2",
  "modified": "2026-05-13T13:38:50Z",
  "published": "2026-05-04T19:50:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/security/advisories/GHSA-2h7v-4372-f6x2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42069"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/getkirby/kirby"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/4.9.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/5.4.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kirby CMS\u0027s read access to site, user and role information is not gated by permissions"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-42069 (GCVE-0-2026-42069)

FKIE_CVE-2026-42069

GHSA-2H7V-4372-F6X2

TL;DR

Introduction

Impact

Patches

Credits

Tags

Sightings

Nomenclature