{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-25716", "assignerOrgId": "ff95705b-1a40-4639-8017-a58fa868baee", "state": "PUBLISHED", "assignerShortName": "HW", "dateReserved": "2026-02-06T14:21:19.094Z", "datePublished": "2026-10-23T08:53:47.208Z", "dateUpdated": "2026-10-29T01:52:06.615Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "ff95705b-1a40-4639-8017-a58fa868baee", "shortName": "HW", "dateUpdated": "2026-10-23T08:56:11.231Z" }, "title": "BlueSpiceUserManager: Missing authorization in REST endpoints for blocking and unblocking users", "datePublic": "2026-10-02T00:00:00.000Z", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-862", "description": "CWE-862 Missing Authorization", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-122", "descriptions": [ { "lang": "en", "value": "CAPEC-122 Privilege Abuse" } ] } ], "affected": [ { "vendor": "Hallo Welt! GmbH", "product": "BlueSpice", "collectionURL": "https://github.com/wikimedia/mediawiki-extensions-BlueSpiceUserManager", "packageName": "Extension:BlueSpiceUserManager", "repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/BlueSpiceUserManager", "programFiles": [ "src/UserManager.php", "src/Rest/BlockUsersHandler.php", "src/Rest/UnblockUsersHandler.php" ], "programRoutines": [ { "name": "BlueSpice\\UserManager\\UserManager::blockUser" }, { "name": "BlueSpice\\UserManager\\UserManager::unblockUser" } ], "versions": [ { "status": "affected", "version": "5.0.0", "lessThan": "5.1.11", "versionType": "semver" }, { "status": "affected", "version": "5.2.0", "lessThan": "5.2.7", "versionType": "semver" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "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.

This issue affects BlueSpice: from 5.0.0 before 5.1.11, from 5.2.0 before 5.2.7.

" } ] } ], "references": [ { "url": "https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07", "tags": [ "vendor-advisory" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "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" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H" } } ], "workarounds": [ { "lang": "en", "value": "Deny access to the REST paths /rest.php/bs-usermanager/v1/block/create and /rest.php/bs-usermanager/v1/block/delete on the web server or reverse proxy. Note that this also disables enabling/disabling users from Special:UserManager.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "Deny access to the REST paths /rest.php/bs-usermanager/v1/block/create and /rest.php/bs-usermanager/v1/block/delete on the web server or reverse proxy. Note that this also disables enabling/disabling users from Special:UserManager." } ] } ], "solutions": [ { "lang": "en", "value": "Update to BlueSpice 5.1.11 or 5.2.7 or later.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "Update to BlueSpice 5.1.11 or 5.2.7 or later." } ] } ], "credits": [ { "lang": "en", "value": "kta1kri", "type": "finder" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Hallo Welt! CERT" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-25716", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-29T01:40:46.901774Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-29T01:52:06.615Z" } } ] } }