BlueSpiceUserManager: Missing authorization in REST endpoints for blocking and unblocking users
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.
CVE-2026-25716
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-25716
BlueSpice
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/BlueSpiceUserManager",
"vendor": "Hallo Welt! GmbH",
"product": "BlueSpice",
"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"
}
],
"packageName": "Extension:BlueSpiceUserManager",
"programFiles": [
"src/UserManager.php",
"src/Rest/BlockUsersHandler.php",
"src/Rest/UnblockUsersHandler.php"
],
"collectionURL": "https://github.com/wikimedia/mediawiki-extensions-BlueSpiceUserManager",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "BlueSpice\\UserManager\\UserManager::blockUser"
},
{
"name": "BlueSpice\\UserManager\\UserManager::unblockUser"
}
]
}
]- Related CVEs
- CVE-2026-25716
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #52627 · Revision 1
- Added to Heist Feed
- Publisher date