{"id":"CVE-2026-56381","aliases":["EUVD-2026-38175","GHSA-9r7j-7jhg-4f4c","GHSA-g3hp-vvqf-8vw6"],"status":"published","title":"Craft CMS - Stored XSS via User Group Name in User Permissions Page","description":"Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","severity":{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00181,"percentile":0.07734,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-03-11T14:56:59Z","modified":"2026-11-08T14:06:07Z","fixes":[{"ecosystem":"Packagist","package":"craftcms/cms","fixed_in":["5.8.22"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"last_affected":"5.8.21"},{"fixed":"5.8.22"}]}]},{"source":"osv","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.8.22"}]}],"versions":["5.0.0","5.0.0-RC1","5.0.1","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.1.0","5.1.1","5.1.10","5.1.2","5.1.3","5.1.4","5.1.5","5.1.6","5.1.7","5.1.8","5.1.9","5.2.0","5.2.0-beta.1","5.2.0-beta.2","5.2.0-beta.3","5.2.0-beta.4","5.2.0-beta.5","5.2.0-beta.6","5.2.1","5.2.10","5.2.2","5.2.3","5.2.4","5.2.4.1","5.2.5","5.2.6","5.2.7","5.2.8","5.2.9","5.3.0","5.3.0-beta.1","5.3.0-beta.2","5.3.0.1","5.3.0.2","5.3.0.3","5.3.1","5.3.2","5.3.3","5.3.4","5.3.5","5.3.6","5.4.0","5.4.0.1","5.4.1","5.4.10","5.4.10.1","5.4.2","5.4.3","5.4.4","5.4.5","5.4.5.1","5.4.6","5.4.7","5.4.7.1","5.4.8","5.4.9","5.5.0","5.5.0.1","5.5.1","5.5.1.1","5.5.10","5.5.2","5.5.3","5.5.4","5.5.5","5.5.6","5.5.6.1","5.5.7","5.5.8","5.5.9","5.6.0","5.6.0.1","5.6.0.2","5.6.1","5.6.10","5.6.10.1","5.6.10.2","5.6.11","5.6.12","5.6.13","5.6.14","5.6.15","5.6.16","5.6.17","5.6.2","5.6.3","5.6.4","5.6.5","5.6.5.1","5.6.6","5.6.7","5.6.8","5.6.9","5.6.9.1","5.7.0","5.7.0-beta.1","5.7.0-beta.2","5.7.1","5.7.1.1","5.7.10","5.7.11","5.7.2","5.7.3","5.7.4","5.7.5","5.7.6","5.7.7","5.7.8","5.7.8.1","5.7.8.2","5.7.9","5.8.0","5.8.1","5.8.10","5.8.11","5.8.12","5.8.13","5.8.13.1","5.8.13.2","5.8.14","5.8.15","5.8.16","5.8.17","5.8.18","5.8.19","5.8.2","5.8.20","5.8.21","5.8.3","5.8.4","5.8.5","5.8.6","5.8.7","5.8.8","5.8.9"]}],"products":[{"vendor":"craftcms","product":"cms"},{"vendor":"statamic","product":"cms"}],"references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-g3hp-vvqf-8vw6","tags":["vendor-advisory","exploit","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/craft-cms-stored-xss-via-user-group-name-in-user-permissions-page","tags":["third-party-advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56381","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9r7j-7jhg-4f4c"},{"url":"https://github.com/craftcms/cms/releases/tag/5.8.22","tags":["web"]},{"url":"https://github.com/advisories/GHSA-g3hp-vvqf-8vw6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56381.json","tags":["advisory"]},{"url":"https://github.com/craftcms/cms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-56381","title":"Craft CMS - Stored XSS via User Group Name in User Permissions Page","description":"Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"published","published":"2026-06-21T13:26:58.292Z","modified":"2026-11-08T14:06:07.786Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-38175","description":"Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"published","published":"2026-06-21T13:26:58Z","modified":"2026-11-08T14:06:07Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-08T15:13:07.762611Z"}],"ghsa":[{"id":"GHSA-9r7j-7jhg-4f4c","title":"Duplicate Advisory: Craft CMS Vulnerable to Stored XSS via User Group Name in User Permissions Page","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-g3hp-vvqf-8vw6. This link is maintained to preserve external references.\n\n## Original Description\nCraft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"withdrawn","published":"2026-06-21T15:31:24Z","modified":"2026-08-06T21:37:47Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:57.999375Z"},{"id":"GHSA-g3hp-vvqf-8vw6","title":"Craft CMS Vulnerable to Stored XSS via User Group Name in User Permissions Page","description":"## Summary\nA stored XSS vulnerability exists in the User Permissions page. The User Group name is rendered without proper HTML escaping in the permissions section, allowing an attacker to execute arbitrary JavaScript when another user views or edits a user's permissions.\n\n\u003e [!NOTE]\n\u003e This is a separate vulnerability from the previously reported \"[Stored XSS via User Group Name in User Settings Page](https://github.com/craftcms/cms/security/advisories/GHSA-2423-8xxj-wc3g)\" and \"[Multiple Stored XSS in User Group Edit Page](https://github.com/craftcms/cms/security/advisories/GHSA-vx7g-xw92-g4xj)\". This affects a different sink: the individual user's permissions page.\n\n## Proof of Concept\n### Required Permissions\n- Admin access\n- `allowAdminChanges` is enabled in production, which is against our [security recommendations](https://craftcms.com/knowledge-base/securing-craft).\n\n### Steps to Reproduce\n1. Log in to the control panel as an admin\n2. Navigate to **Settings → Users → User Groups**\n3. Create or edit a user group and set the **Name** field to:\n    ```html\n    \u003cimg src=x onerror=\"alert('XSS')\" hidden\u003e\n    ```\n4. Save the user group\n5. Navigate to **Users** and edit any user (`/admin/users/{id}`)\n6. Click on the **Permissions** tab\n7. XSS executes\n\n## Mitigation\nSanitize user group names when rendering in the user permissions template.\n\n## References\n\nhttps://github.com/craftcms/cms-ghsa-4mgv-366x-qxvx/pull/2","status":"published","published":"2026-03-11T14:56:59Z","modified":"2026-08-06T21:37:55Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:57.999375Z"}],"nvd":[{"id":"CVE-2026-56381","description":"Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"published","published":"2026-06-21T14:16:25.627Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:24.912854Z"}],"osv":[{"id":"CVE-2026-56381","title":"Craft CMS - Stored XSS via User Group Name in User Permissions Page","description":"Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"published","published":"2026-06-21T13:26:58.292Z","modified":"2026-11-09T02:30:19.082039795Z","cvss":[{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-09T03:16:48.35602Z"},{"id":"GHSA-9r7j-7jhg-4f4c","title":"Duplicate Advisory: Craft CMS Vulnerable to Stored XSS via User Group Name in User Permissions Page","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-g3hp-vvqf-8vw6. This link is maintained to preserve external references.\n\n## Original Description\nCraft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.","status":"withdrawn","published":"2026-06-21T15:31:24Z","modified":"2026-08-06T21:45:58.137668147Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":4.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:44.225359Z"},{"id":"GHSA-g3hp-vvqf-8vw6","title":"Craft CMS Vulnerable to Stored XSS via User Group Name in User Permissions Page","description":"## Summary\nA stored XSS vulnerability exists in the User Permissions page. The User Group name is rendered without proper HTML escaping in the permissions section, allowing an attacker to execute arbitrary JavaScript when another user views or edits a user's permissions.\n\n\u003e [!NOTE]\n\u003e This is a separate vulnerability from the previously reported \"[Stored XSS via User Group Name in User Settings Page](https://github.com/craftcms/cms/security/advisories/GHSA-2423-8xxj-wc3g)\" and \"[Multiple Stored XSS in User Group Edit Page](https://github.com/craftcms/cms/security/advisories/GHSA-vx7g-xw92-g4xj)\". This affects a different sink: the individual user's permissions page.\n\n## Proof of Concept\n### Required Permissions\n- Admin access\n- `allowAdminChanges` is enabled in production, which is against our [security recommendations](https://craftcms.com/knowledge-base/securing-craft).\n\n### Steps to Reproduce\n1. Log in to the control panel as an admin\n2. Navigate to **Settings → Users → User Groups**\n3. Create or edit a user group and set the **Name** field to:\n    ```html\n    \u003cimg src=x onerror=\"alert('XSS')\" hidden\u003e\n    ```\n4. Save the user group\n5. Navigate to **Users** and edit any user (`/admin/users/{id}`)\n6. Click on the **Permissions** tab\n7. XSS executes\n\n## Mitigation\nSanitize user group names when rendering in the user permissions template.\n\n## References\n\nhttps://github.com/craftcms/cms-ghsa-4mgv-366x-qxvx/pull/2","status":"published","published":"2026-03-11T14:56:59Z","modified":"2026-08-06T21:45:58.093864387Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:47.119724Z"}]}}