{"answers":{"affected":"2 open source packages ship an affected version, including craftcms/cms.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56381 exists.","fix":"Upgrade craftcms/cms to 5.8.22 or later.","what":"CVE-2026-56381 is a medium-severity cross-site scripting vulnerability in craftcms cms, published on 21 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-56381 and fix it if it is affected.\n\nWhat it is: CVE-2026-56381 is a medium-severity cross-site scripting vulnerability in craftcms cms, published on 21 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56381 exists.\n\nAffected packages and fixed versions:\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.22\n- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.8.22\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-56381/ (Markdown: https://insights.sbomify.com/CVE-2026-56381/index.md)","id":"CVE-2026-56381","markdown":"https://insights.sbomify.com/CVE-2026-56381/index.md","name":"CVE-2026-56381","record":{"aliases":["GHSA-g3hp-vvqf-8vw6"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Craft CMS","requires_auth":"high_privilege","summary":"Admins can inject JavaScript via user group names in Craft CMS, leading to stored XSS and potential account takeover when viewed by others.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":4.6,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"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.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Craft CMS - Stored XSS via User Group Name in User Permissions Page","id":"CVE-2026-56381","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController","id":"CVE-2026-56382"},"packages":[{"ecosystem":"Packagist","fixed":["5.8.22"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":null,"source":"GHSA-g3hp-vvqf-8vw6"},{"ecosystem":"Packagist","fixed":["5.8.22"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"craftcms/cms","purl":"pkg:composer/craftcms/cms","source":"GHSA-g3hp-vvqf-8vw6"}],"prev":{"headline":"AVideo feed/index.php Exposure of Channel Owner Email Address","id":"CVE-2026-56380"},"products":["cms"],"published":"2026-06-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["craftcms"]},"summary":"Admins can inject JavaScript via user group names in Craft CMS, leading to stored XSS and potential account takeover when viewed by others.","url":"https://insights.sbomify.com/CVE-2026-56381/"}