Kirby
Kirby 3.9 (Brookesia)
Kirby 3.9 (Brookesia)
The Kirby 3.9 (Brookesia) reached end of service life on Nov 27, 2025 — Kirby no longer ships security patches or fixes for it. Our third-party support keeps it safe to run: 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance.
End of Service LifeEOSL Date: Nov 27, 2025
Issue Management
24/7 engineers own your Kirby 3.9 (Brookesia) incidents end to end.
Vulnerability Remediation
Mitigation and patch-around guidance when the vendor no longer ships fixes.
Compliance Maintenance
Controls evidence and documentation that keep auditors satisfied.
Specifications
- product
- kirby
- release
- 3.9
- product Label
- Kirby
- release Label
- 3.9 (Brookesia)
- codename
- Brookesia
- lts
- latest Version
- 3.9.8.3
- release Date
- 2023-01-17
- maintained
- source Url
- https://endoflife.date/kirby
Lifecycle Dates
- End of Service Life
- Nov 27, 2025
- Last OEM Support
- Nov 27, 2025
OEM vs. 3rd Party Support
See how third-party support compares to the vendor contract for Kirby 3.9 (Brookesia) — monitoring, break/fix, vulnerability work, operations and compliance, before and after EOSL.
| Feature | OEM Support | 3rd Party Support |
|---|---|---|
| Post-EOSL Support | ||
| Break/Fix Support | Until EOSL | |
| 24/7 Monitoring | ||
| Vulnerability Scanning & Remediation | ||
| Managed Operations | ||
| Procedure & Configuration Review | ||
| Compliance & Audit Documentation | Limited | |
| Discounted Migration to Other Platforms |
Why Choose 3rd Party Support for Kirby 3.9 (Brookesia)?
Vulnerability Remediation
Scanning, mitigation and patch-around guidance for Kirby 3.9 (Brookesia) when the vendor no longer ships fixes.
Compliance Maintenance
Procedure review, controls evidence and the documentation auditors ask for — maintained continuously, not scrambled at audit time.
24/7 Expert Support
Engineers who know this release monitor, manage and fix issues around the clock — break/fix to managed operations.
Kirby 3.9 (Brookesia) Support: Frequently Asked Questions
Is the Kirby 3.9 (Brookesia) still supported?
Kirby ended support for the Kirby 3.9 (Brookesia) on Nov 27, 2025 — no more patches or fixes from the vendor. Third-party support keeps it covered: our engineers manage issues, remediate vulnerabilities, and help you maintain compliance for as long as you run it.
When is the Kirby 3.9 (Brookesia) end of service life (EOSL) date?
Kirby lists the end of service life for the Kirby 3.9 (Brookesia) as Nov 27, 2025.
Can I keep using the Kirby 3.9 (Brookesia) after its EOSL date?
Yes. EOSL means Kirby stops issuing patches and support — the software itself keeps running. Third-party support covers it from there: issue management, security vulnerability remediation, and the compliance documentation auditors ask for, for as long as you choose to run it.
How much does third-party support for the Kirby 3.9 (Brookesia) cost?
Typically 40-70% below the OEM maintenance renewal price. Exact pricing depends on quantity, service level and location — request a quote and we respond within 24 hours.
Known Vulnerabilities Affecting Kirby 3.9 (Brookesia)
20 published CVEs affect the Kirby 3.9 (Brookesia), including 8 rated critical or high severity. Kirby no longer ships security patches for this release — our engineers provide mitigation guidance, workarounds and hardening support.
| CVE | Severity | CVSS | Published | Summary |
|---|---|---|---|---|
| CVE-2024-26483 | HIGH | 8.8 | Feb 22, 2024 | An arbitrary file upload vulnerability in the Profile Image module of Kirby CMS v4.1.0 allows attackers to execute arbitrary code via a crafted PDF file. |
| CVE-2024-41964 | HIGH | 8.1 | Aug 29, 2024 | Kirby is a CMS targeting designers and editors. Kirby allows to restrict the permissions of specific user roles. Users of that role can only perform permitted actions. Permissions for creating and deleting languages have already existed and could be configured, but were not enforced by Kirby's frontend or backend code. A permission for updating existing languages has not existed before the patched versions. So disabling the languages.* wildcard permission for a role could not have prohibited upd |
| CVE-2026-34587 | HIGH | 7.6 | Apr 24, 2026 | Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, 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 togeth |
| CVE-2023-38489 | HIGH | 7.3 | Jul 27, 2023 | Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites with user accounts (unless Kirby's API and Panel are disabled in the config). It can only be abused if a Kirby user is logged in on a device or browser that is shared with potentially untrusted users or if an attacker already maliciously used a previous password to log in to a Kirby site as the affected user. Insufficient Session Expiration is when a w |
| CVE-2026-42137 | HIGH | 7.1 | May 9, 2026 | Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0. |
| CVE-2026-42069 | HIGH | 7.1 | May 9, 2026 | 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. |
| CVE-2026-41325 | HIGH | 7.1 | Apr 24, 2026 | Kirby is an open-source content management system. 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 use |
| CVE-2023-38488 | HIGH | 7.1 | Jul 27, 2023 | Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites that might have potential attackers in the group of authenticated Panel users or that allow external visitors to update a Kirby content file (e.g. via a contact or comment form). Kirby sites are *not* affected if they don't allow write access for untrusted users or visitors. A field injection in a content storage implementation is a type of vulnerabili |
| CVE-2026-32870 | MEDIUM | 6.9 | Apr 24, 2026 | Kirby is an open-source content management system. Kirby's `Xml::value()` method has special handling for `<![CDATA[ ]]>` blocks. If the input value is already valid `CDATA`, it is not escaped a second time but allowed to pass through. However, prior to versions 4.9.0 and 5.4.0, it was possible to trick this check into allowing values that only contained a valid `CDATA` block but also contained other structured data outside of the `CDATA` block. This structured data would then also be allowed to |
| CVE-2023-38490 | MEDIUM | 6.8 | Jul 27, 2023 | Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 only affects Kirby sites that use the `Xml` data handler (e.g. `Data::decode($string, 'xml')`) or the `Xml::parse()` method in site or plugin code. The Kirby core does not use any of the affected methods. XML External Entities (XXE) is a little used feature in the XML markup language that allows to include data from external files in an XML structure. If the name of the exter |
| CVE-2026-29905 | MEDIUM | 6.5 | Mar 26, 2026 | Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a persistent Denial of Service (DoS) via a malformed image upload. The application fails to properly validate the return value of the PHP getimagesize() function. When the system attempts to process this file for metadata or thumbnail generation, it triggers a fatal TypeError. |
| CVE-2025-31493 | MEDIUM | 6.3 | May 13, 2025 | Kirby is an open-source content management system. A vulnerability in versions prior to 3.9.8.3, 3.10.1.2, and 4.7.1 affects all Kirby sites that use the `collection()` helper or `$kirby->collection()` method with a dynamic collection name (such as a collection name that depends on request or user data). Sites that only use fixed calls to the `collection()` helper/`$kirby->collection()` method (i.e. calls with a simple string for the collection name) are *not* affected. A missing path traversal |
| CVE-2025-30159 | MEDIUM | 6.3 | May 13, 2025 | Kirby is an open-source content management system. A vulnerability in versions prior to 3.9.8.3, 3.10.1.2, and 4.7.1 affects all Kirby sites that use the `snippet()` helper or `$kirby->snippet()` method with a dynamic snippet name (such as a snippet name that depends on request or user data). Sites that only use fixed calls to the `snippet()` helper/`$kirby->snippet()` method (i.e. calls with a simple string for the snippet name) are *not* affected. A missing path traversal check allowed attacke |
| CVE-2023-38491 | MEDIUM | 5.7 | Jul 27, 2023 | Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites that might have potential attackers in the group of authenticated Panel users or that allow external visitors to upload an arbitrary file to the content folder. Kirby sites are not affected if they don't allow file uploads for untrusted users or visitors or if the file extensions of uploaded files are limited to a fixed safe list. The attack requires us |
| CVE-2026-42174 | MEDIUM | 5.3 | May 9, 2026 | Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, user avatar creation, replacement and deletion are not gated by user update permissions. This issue has been patched in versions 4.9.0 and 5.4.0. |
| CVE-2026-42051 | MEDIUM | 5.3 | May 9, 2026 | Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0. |
| CVE-2026-40099 | MEDIUM | 5.3 | Apr 24, 2026 | Kirby is an open-source content management system. 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 use |
| CVE-2023-38492 | MEDIUM | 5.3 | Jul 27, 2023 | Kirby is a content management system. A vulnerability in versions prior to 3.5.8.3, 3.6.6.3, 3.7.5.2, 3.8.4.1, and 3.9.6 affects all Kirby sites with user accounts (unless Kirby's API and Panel are disabled in the config). The real-world impact of this vulnerability is limited, however we still recommend to update to one of the patch releases because they also fix more severe vulnerabilities. Kirby's authentication endpoint did not limit the password length. This allowed attackers to provide a |
| CVE-2024-26481 | MEDIUM | 4.7 | Feb 22, 2024 | Kirby CMS v4.1.0 was discovered to contain a reflected self-XSS vulnerability via the URL parameter. |
| CVE-2025-30207 | LOW | 2.3 | May 13, 2025 | Kirby is an open-source content management system. A vulnerability in versions prior to 3.9.8.3, 3.10.1.2, and 4.7.1 affects all Kirby setups that use PHP's built-in server. Such setups are commonly only used during local development. Sites that use other server software (such as Apache, nginx or Caddy) are not affected. A missing path traversal check allowed attackers to navigate all files on the server that were accessible to the PHP process, including files outside of the Kirby installation. |
Related Kirby Products
All Kirby products →Kirby 3.9 (Brookesia)
Save 40-70% vs OEM