CVE-2026-56393

Summary

Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

Affected Software

Weaknesses

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx

References

• https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx
• https://github.com/craftcms/cms/commit/943152d2246b36f12adf161a03b8695b773d9276
• https://github.com/craftcms/cms/commit/67780a778c6ec04e68e64a0b1177c168306144a2
• https://www.vulncheck.com/advisories/craft-cms-multiple-stored-cross-site-scripting-in-settings-names-and-field-options

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