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CVE-2026-42174

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

MEDIUM
4.3
CVSS Score
Published: May 9, 2026 at 03:39 AM UTC
Updated: July 24, 2026 at 09:20 PM UTC
1 product affected across 1 vendorKirby

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Kirby· Getkirbycomposer
95%
v < 4.9.0v < 5.4.05.0.0 ≤ v < 5.4.0
Affected range stops below 4.9.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMPatchVendor Advisory
Source: cverecord
https://github.com/getkirby/kirby/security/advisories/GHSA-39cp-6679-8xv2
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/getkirby/kirby/releases/tag/4.9.0
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/getkirby/kirby/releases/tag/5.4.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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