CVE-2026-25716

BlueSpiceUserManager: Missing authorization in REST endpoints for blocking and unblocking users

State: Published
Severity: 7.1 High
Published: Oct 23, 2026
Updated: Oct 29, 2026
Reserved: Feb 6, 2026

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.

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

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	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	HW
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	HW

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
BlueSpiceHallo Welt! GmbH	5.0.0 to before 5.1.11Affected 5.2.0 to before 5.2.7Affected

References

https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07vendor-advisory

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