youlai-boot: Missing authorization in role menu assignment allows privilege escalation
Summary
youlai-boot through version 2.21.1 does not check authorization on the endpoint that assigns menus and buttons to roles (PUT /api/v1/roles/{roleId}/menus). An authenticated user with low privileges, such as a GUEST test account, can grant all permissions to their own role. After the Redis permission cache is refreshed, the user gains administrator-equivalent access. The attack requires a valid login but no user interaction.
Affected
- youlai-boot 0 to 2.21.1 (according to the CNA record and VulnCheck)
- Affected range per OSV: all commits before the fix
Fixed in
- Unknown. A fix commit is referenced (36d2db6dc559817bd4e02b1f33b1998891850497), but no patched release has been confirmed. The latest release found, v2.21.1, is affected.
Workaround
- No vendor-published workaround found.
- Restrict role-management rights and remove or disable shared and test accounts such as GUEST.
- Limit access to the admin interface to VPN or internal networks.
- Review role and permission changes for unexpected menu or button grants.
Exploitation
- Known exploited: not known. CISA SSVC lists exploitation as PoC and automatable as no.
- A public HackMD write-up is referenced; no public exploit repository was found.
- EPSS 0.00411 (low).
Our recommendation
- Check whether your deployment or fork uses youlai-boot up to 2.21.1 and whether it is reachable from the internet or shared with external users.
- Verify that the fix commit is merged into your code and that the role-menu endpoint checks the caller's authority.
- Remove default test accounts and enforce least privilege for role management.
- Monitor role-permission changes and audit logs; after manual fixes, confirm the Redis permission cache is refreshed.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- GitHub: RoleController.java (v2.21.1) github.com
- GitHub: RoleServiceImpl.java (v2.21.1) github.com
- GitHub: Fix commit 36d2db6 github.com
- VulnCheck advisory www.vulncheck.com
- HackMD write-up hackmd.io
- OSV: CVE-2026-110215 osv.dev
- youlai-boot releases github.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 04:20.
Original description (NVD)
youlai-boot through 2.21.1 contains a missing authorization vulnerability that allows authenticated users to assign arbitrary menu and button permissions to roles via PUT /api/v1/roles/{roleId}/menus. Low-privileged users such as the GUEST test account can grant all permissions to their own role, refreshing the Redis permission cache to gain administrator-equivalent access.
NVD references (6)
- https://github.com/youlaitech/youlai-boot/blob/v2.21.1/src/main/java/com/youlai/boot/system/controller/RoleCo…
- https://github.com/youlaitech/youlai-boot/blob/v2.21.1/src/main/java/com/youlai/boot/system/service/impl/Role…
- https://github.com/youlaitech/youlai-boot/commit/36d2db6dc559817bd4e02b1f33b1998891850497
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/youlai-boot-role-menu-assignment-and-user-status-missing-authorizat…
- https://www.vulncheck.com/advisories/youlai-boot-through-2.21.1-missing-authorization-in-role-menu-assignment…
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/youlai-boot-role-menu-assignment-and-user-status-missing-authorizat…
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.