CVE Tools
Sign in

CVE-2026-42174

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

Published: May 9, 2026Updated: May 18, 2026 Sources: CVE List NVDCWE-862
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.2%
Top 85.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-862

Affected Products

kirbygetkirby
On-prem
Web & CMS Plugins / cms-core
getkirbycommercialWeb & CMS Plugins

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/getkirby/kirby/releases/tag/4.9.0
github.com
https://github.com/getkirby/kirby/releases/tag/5.4.0
github.com
https://github.com/getkirby/kirby/security/advisories/GHSA-39cp-6679-8xv2
github.com

Timeline

Published
May 9, 2026
Last Updated
May 18, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-42174 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows