CVE-2026-56393Public exploitNetwork attack vector

Stored script execution via raw settings labels

Published Jun 21, 2026 · Updated Jun 21, 2026

Stored XSS in Craft CMS 4.x before 4.17.0-beta.1 and 5.x before 5.9.0-beta.1 allows remote authenticated users to execute JavaScript. The checkbox.twig and radio.twig templates render labels as raw content, while related UI helpers insert option text without HTML escaping. Exploitation requires administrator access and allowAdminChanges enabled; opening an affected control-panel screen runs the stored payload in another user's session.

CVSS severity4.6
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Craft CMS 4.x before 4.17.0-beta.1 and 5.x before 5.9.0-beta.1 allows remote authenticated users to execute JavaScript. The checkbox.twig and radio.twig templates render labels as raw content, while related UI helpers insert option text without HTML escaping. Exploitation requires administrator access and allowAdminChanges enabled; opening an affected control-panel screen runs the stored payload in another user's session.

The record

CVE
CVE-2026-56393
Published
Jun 21, 2026
Updated
Jun 21, 2026
Vendor
Pixel & Tonic
Product
Craft CMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0-RC1 <4.17.0-beta.1
  2. Affected versionversion=5.0.0-RC1 <5.9.0-beta.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Pixel & Tonic · Craft CMSversion=4.0.0-RC1 <4.17.0-beta.1; version=5.0.0-RC1 <5.9.0-beta.1

Published CVSS scores

4.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
4.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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