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CVE-2026-49276

31
FAUCET Score

Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.

First published: Jul 9, 2026Last modified: Jul 9, 2026

Impacted Technologies

VendorProductVersion(s)CPE
GetkirbyKirby
< 4.9.4, >= 5.0.0, < 5.4.4CNA affected

CVSS Data

CVSS version used by this source: 4.0

7.4HIGH

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 21st percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: getkirby/cmsFixed in: 4.9.4
composerpatch availablevia ghsa
Product: getkirby/cmsFixed in: 5.4.4

Vendor Advisories (1)

composerGHSA-rhj6-r49h-5932high

Kirby: Self cross-site scripting (self-XSS) in the writer field

Jun 18, 2026

References

github.com / getkirby/kirby/releases/tag/4.9.4
github.com / getkirby/kirby/releases/tag/5.4.4
github.com / getkirby/kirby/security/advisories/GHSA-rhj6-r49h-5932