{"id":"CVE-2021-22966","aliases":["EUVD-2021-2360","GHSA-j4mv-2rv7-v2j9"],"status":"published","title":"Improper Privilege Management in Concrete CMS","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: \"Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )\"This fix is also in Concrete version 9.0.0","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00981,"percentile":0.62494,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269","CWE-863"],"published":"2021-11-19T18:09:48Z","modified":"2026-10-24T10:30:27Z","fixes":[{"ecosystem":"Packagist","package":"concrete5/core","fixed_in":["8.5.7"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"concrete5/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.7"}]}]},{"source":"osv","ecosystem":"Packagist","package":"concrete5/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.7"}]}],"versions":["8.2.0","8.2.0RC2","8.2.1","8.3.0","8.3.1","8.3.2","8.4.0","8.4.0RC3","8.4.0RC4","8.4.1","8.4.2","8.4.3","8.4.4","8.4.5","8.5.0","8.5.0RC1","8.5.0RC2","8.5.1","8.5.2","8.5.3","8.5.4","8.5.5","8.5.6","8.5.6RC1"]}],"products":[{"vendor":"concretecms","product":"concrete_cms"}],"references":[{"url":"https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://hackerone.com/reports/1362747","tags":["x_refsource_MISC","x_transferred","Permissions Required","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22966","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j4mv-2rv7-v2j9"}],"sources":{"cve":[{"id":"CVE-2021-22966","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: \"Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )\"This fix is also in Concrete version 9.0.0","status":"published","published":"2021-11-19T18:09:48Z","modified":"2024-08-03T18:58:26.123Z","updated_at":"2026-11-02T14:32:58.028461Z"}],"euvd":[{"id":"EUVD-2021-2360","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: \"Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )\"This fix is also in Concrete version 9.0.0","status":"published","published":"2021-11-19T18:09:48Z","modified":"2024-08-03T18:58:26Z","updated_at":"2026-11-03T03:25:00.591933Z"}],"ghsa":[{"id":"GHSA-j4mv-2rv7-v2j9","title":"Improper Privilege Management in Concrete CMS ","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved.","status":"published","published":"2021-11-23T18:18:07Z","modified":"2023-01-27T05:01:59Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:36:17.04874Z"}],"nvd":[{"id":"CVE-2021-22966","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: \"Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )\"This fix is also in Concrete version 9.0.0","status":"published","published":"2021-11-19T19:15:08.327Z","modified":"2026-06-17T03:38:07.397Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-22966","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: \"Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )\"This fix is also in Concrete version 9.0.0","status":"published","published":"2021-11-19T19:15:08.327Z","modified":"2026-10-24T10:30:27.319288449Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"GHSA-j4mv-2rv7-v2j9","title":"Improper Privilege Management in Concrete CMS ","description":"Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted \"view\" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved.","status":"published","published":"2021-11-23T18:18:07Z","modified":"2023-11-08T04:05:02.309372Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:46:49.977351Z"}]}}