CVE-2026-30926 SiYuan Note publish service authorization bypass allows low-privilege users to modify notebook content

SiYuan is a personal knowledge management system. Prior to 3.5.10, a privilege escalation vulnerability exists in the publish service of SiYuan Note that allows low-privilege publish accounts RoleReader to modify notebook content via the /api/block/appendHeadingChildren API endpoint. The endpoint...

CVE-2026-30926

SiYuan is a personal knowledge management system. Prior to 3.5.10, a privilege escalation vulnerability exists in the publish service of SiYuan Note that allows low-privilege publish accounts RoleReader to modify notebook content via the /api/block/appendHeadingChildren API endpoint. The endpoint...

CVE-2026-30926 SiYuan Note publish service authorization bypass allows low-privilege users to modify notebook content

SiYuan is a personal knowledge management system. Prior to 3.5.10, a privilege escalation vulnerability exists in the publish service of SiYuan Note that allows low-privilege publish accounts RoleReader to modify notebook content via the /api/block/appendHeadingChildren API endpoint. The endpoint...

SiYuan: Authorization Bypass Allows Low-Privilege Publish User to Modify Notebook Content via /api/block/appendHeadingChildren

Summary A privilege escalation vulnerability exists in the publish service of SiYuan Note that allows a low-privilege publish account RoleReader to modify notebook content via the /api/block/appendHeadingChildren API endpoint. The endpoint only requires model.CheckAuth, which accepts RoleReader...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the /api/block/appendHeadingChildren endpoint. An attacker can alter notebook content and compromise data integrity by sending crafted requests to this endpoint using a low-privilege authenticated account...

EUVD-2026-10393

SiYuan: Authorization Bypass Allows Low-Privilege Publish User to Modify Notebook Content via /api/block/appendHeadingChildren...

EUVD-2025-208359

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system...

EUVD-2025-208354

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to read arbitrary files on the system...

EUVD-2025-208360

A low-privileged remote attacker can abuse the backup restore functionality of UBR ubr-restore which runs with elevated privileges and does not validate the contents of the backup archive to create or overwrite arbitrary files anywhere on the system...

EUVD-2025-208361

A low-privileged remote attacker can abuse the backup restore functionality of UBR ubr-restore which runs with elevated privileges and does not validate the contents of the backup archive to create or overwrite arbitrary files anywhere on the system...

EUVD-2025-208355

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to read arbitrary files on the system...

EUVD-2025-208372

A low‑privileged remote attacker can directly interact with the wwwdnload.cgi endpoint to download any resource available to administrators, including system backups and certificate request files...

EUVD-2025-208373

A low‑privileged remote attacker can directly interact with the wwwdnload.cgi endpoint to download any resource available to administrators, including system backups and certificate request files...

EUVD-2025-208362

A low-privileged remote attacker can exploit an arbitrary file write vulnerability in the wwupload.cgi endpoint. Due to path traversal this can lead to overwriting arbitrary files on the device and achieving a full system compromise...

EUVD-2025-208358

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system...

EUVD-2025-208379

A low-privileged remote attacker can trigger a stack-based buffer overflow via a crafted HTTP POST request using the ubr-network method resulting in full device compromise...

CVE-2025-41766

A low-privileged remote attacker can trigger a stack-based buffer overflow via a crafted HTTP POST request using the ubr-network method resulting in full device compromise...

CVE-2025-41763

A low‑privileged remote attacker can directly interact with the wwwdnload.cgi endpoint to download any resource available to administrators, including system backups and certificate request files...

CVE-2025-41763

A low‑privileged remote attacker can directly interact with the wwwdnload.cgi endpoint to download any resource available to administrators, including system backups and certificate request files...

CVE-2025-41757

A low-privileged remote attacker can abuse the backup restore functionality of UBR ubr-restore which runs with elevated privileges and does not validate the contents of the backup archive to create or overwrite arbitrary files anywhere on the system...