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TI-2025-21543 Aliases CVE-2025-30207GHSA-9p3p-w5jf-8xxg

Kirby vulnerable to path traversal in the router for PHP's built-in server

Priority LOW 13CWE-22Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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. The vulnerable implementation delegated all existing files to PHP, including existing files outside of the document root. This leads to a different response that allows attackers to determine whether the requested file exists. Because Kirby's router only delegates such requests to PHP and does not load or execute them, contents of the files were not exposed as PHP treats requests to files outside of the document root as invalid. The problem has been patched in Kirby 3.9.8.3, Kirby 3.10.1.2, and Kirby 4.7.1. In all of the mentioned releases, the maintainers of Kirby have updated the router to check if existing static files are within the document root. Requests to files outside the document root are treated as page requests of the error page and will no longer allow to determine whether the file exists or not.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00588 48th percentileScored 2026-11-07
Fix Fixed kirby (getkirby): 3.9.8.3, 3.10.1.2, 4.7.1getkirby/cms (Packagist): 3.9.8.3, 3.10.1.2, 4.7.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getkirbykirbybefore 3.9.8.3; 3.10.0 to before 3.10.1.2; 4.0.0 to before 4.7.13.9.8.3, 3.10.1.2, 4.7.1Patch availableCNA
—getkirby/cms (Packagist)before 3.9.8.33.9.8.3Patch availableGHSA-9p3p-w5jf-8xxg
—getkirby/cms (Packagist)3.10.0 to before 3.10.1.23.10.1.2Patch availableGHSA-9p3p-w5jf-8xxg
—getkirby/cms (Packagist)4.0.0 to before 4.7.14.7.1Patch availableGHSA-9p3p-w5jf-8xxg
  • kirby Vendorgetkirby Affected before 3.9.8.3; 3.10.0 to before 3.10.1.2; 4.0.0 to before 4.7.1 Fixed in 3.9.8.3, 3.10.1.2, 4.7.1 Patch available CNA
  • getkirby/cms (Packagist) Vendor— Affected before 3.9.8.3 Fixed in 3.9.8.3 Patch available GHSA-9p3p-w5jf-8xxg
  • getkirby/cms (Packagist) Vendor— Affected 3.10.0 to before 3.10.1.2 Fixed in 3.10.1.2 Patch available GHSA-9p3p-w5jf-8xxg
  • getkirby/cms (Packagist) Vendor— Affected 4.0.0 to before 4.7.1 Fixed in 4.7.1 Patch available GHSA-9p3p-w5jf-8xxg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*before 3.9.8.3; 3.10.0 to before 3.10.1.2; 4.0.0 to before 4.7.1Vulnerablegetkirby
  • cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* Versions before 3.9.8.3; 3.10.0 to before 3.10.1.2; 4.0.0 to before 4.7.1 Vulnerable ·getkirby

Remediation

  • Fix · CNA kirby (getkirby) Fixed in 3.9.8.3, 3.10.1.2, 4.7.1
  • Fix · GHSA-9p3p-w5jf-8xxg getkirby/cms (Packagist) Fixed in 3.9.8.3 Advisory →
  • Fix · GHSA-9p3p-w5jf-8xxg getkirby/cms (Packagist) Fixed in 3.10.1.2 Advisory →
  • Fix · GHSA-9p3p-w5jf-8xxg getkirby/cms (Packagist) Fixed in 4.7.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-30207
  2. 2026-10-03 Alias added: GHSA-9p3p-w5jf-8xxg

References

Advisory 2

Other 5

  • TI-2024-17440 An arbitrary file upload vulnerability in the Profile Image module of Kirby CMS v4.1.0… CVSS 3.1HIGH 8.8
  • TI-2024-17439 An HTML injection vulnerability exists in the Edit Content Layout module of Kirby CMS… CVSS 3.1HIGH 7.1
  • TI-2026-23396 Kirby CMS through 5.1.4 allows an authenticated user with 'Editor' permissions to cause a… CVSS 3.1MEDIUM 6.5
  • TI-2024-17441 A stored cross-site scripting (XSS) vulnerability in the Edit Content Layout module of… CVSS 3.1MEDIUM 6.1
  • TI-2018-10413 An issue was discovered in Kirby 2.5.12. CVSS 3.1MEDIUM 5.4
  • TI-2024-17438 Kirby CMS v4.1.0 was discovered to contain a reflected self-XSS vulnerability via the URL parameter. CVSS 3.1MEDIUM 4.7
See all 40 →

Sources

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