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TI-2026-30499 Aliases CVE-2026-42174GHSA-39cp-6679-8xv2

Kirby: User avatar creation, replacement and deletion are not gated by user update permissions

Priority LOW 24CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00237 14th percentileScored 2026-11-07
Fix Fixed kirby (getkirby): 4.9.0, 5.4.0getkirby/cms (Packagist): 4.9.0, 5.4.0

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 4.9.0; 5.0.0 to before 5.4.04.9.0, 5.4.0Patch availableCNA
—getkirby/cms (Packagist)before 4.9.04.9.0Patch availableGHSA-39cp-6679-8xv2
—getkirby/cms (Packagist)5.0.0 to before 5.4.05.4.0Patch availableGHSA-39cp-6679-8xv2
  • kirby Vendorgetkirby Affected before 4.9.0; 5.0.0 to before 5.4.0 Fixed in 4.9.0, 5.4.0 Patch available CNA
  • getkirby/cms (Packagist) Vendor— Affected before 4.9.0 Fixed in 4.9.0 Patch available GHSA-39cp-6679-8xv2
  • getkirby/cms (Packagist) Vendor— Affected 5.0.0 to before 5.4.0 Fixed in 5.4.0 Patch available GHSA-39cp-6679-8xv2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*before 4.9.0; 5.0.0 to before 5.4.0Vulnerablegetkirby
  • cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:* Versions before 4.9.0; 5.0.0 to before 5.4.0 Vulnerable ·getkirby

Remediation

  • Fix · CNA kirby (getkirby) Fixed in 4.9.0, 5.4.0
  • Fix · GHSA-39cp-6679-8xv2 getkirby/cms (Packagist) Fixed in 4.9.0 Advisory →
  • Fix · GHSA-39cp-6679-8xv2 getkirby/cms (Packagist) Fixed in 5.4.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42174
  2. 2026-10-03 Alias added: GHSA-39cp-6679-8xv2

References

Patch 1

Advisory 1

Other 3

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences