{"id":"CVE-2026-25716","revision":"c04436e8d6ad4c0daa13b84c352594fb","records":[{"revision":"c04436e8d6ad4c0daa13b84c352594fb","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-25716","aliases":[],"title":"BlueSpiceUserManager: Missing authorization in REST endpoints for blocking and unblocking users","description":"Missing Authorization vulnerability in Hallo Welt! GmbH BlueSpice (Extension:BlueSpiceUserManager) allows any authenticated user without special privileges to block or unblock arbitrary user accounts, including administrators. The REST endpoints /bs-usermanager/v1/block/create and /bs-usermanager/v1/block/delete call UserManager::blockUser() and UserManager::unblockUser(), which do not verify the permissions of the acting user. This allows locking out all administrators (denial of service) and lifting blocks imposed by administrators.\n\nThis issue affects BlueSpice: from 5.0.0 before 5.1.11, from 5.2.0 before 5.2.7.","state":0,"publishedAt":"2026-10-23T08:53:47.208+00:00","modifiedAt":"2026-10-23T08:56:11.231+00:00","affected":[{"ecosystem":"https://github.com/wikimedia/mediawiki-extensions-BlueSpiceUserManager","name":"Extension:BlueSpiceUserManager","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Hallo Welt! GmbH\",\n                    \"product\": \"BlueSpice\",\n                    \"collectionURL\": \"https://github.com/wikimedia/mediawiki-extensions-BlueSpiceUserManager\",\n                    \"packageName\": \"Extension:BlueSpiceUserManager\",\n                    \"repo\": \"https://gerrit.wikimedia.org/r/mediawiki/extensions/BlueSpiceUserManager\",\n                    \"programFiles\": [\n                        \"src/UserManager.php\",\n                        \"src/Rest/BlockUsersHandler.php\",\n                        \"src/Rest/UnblockUsersHandler.php\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"BlueSpice\\\\UserManager\\\\UserManager::blockUser\"\n                        },\n                        {\n                            \"name\": \"BlueSpice\\\\UserManager\\\\UserManager::unblockUser\"\n                        }\n                    ],\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"5.0.0\",\n                            \"lessThan\": \"5.1.11\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"5.2.0\",\n                            \"lessThan\": \"5.2.7\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","score":7.1,"severity":"HIGH"}],"references":["https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-25716","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-25716","identifiers":["CVE-2026-25716"]},"retained":false,"historicalAffected":[]}],"coverage":[]}