CVE-2026-27126
MEDIUM
GHSA-3jh3-prx3-w6wc
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `html` column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and `allowAdminChanges` must be enabled in production, which is against Craft's security recommendations. Versions 4.16.19 and 5.8.23 patch the issue.
Analysis
Stored XSS in Craft CMS 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22 allows high-privileged administrators to inject malicious scripts into HTML-type table columns that execute in other users' browsers. Exploitation requires admin-level access and the `allowAdminChanges` setting enabled in production, limiting the risk to environments with already-compromised administrative accounts. …
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Remediation
Within 30 days: Identify affected systems running versions 4.5.0-RC1 and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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