CVE-2026-25539

CRITICAL

9.1

Descripcion

SiYuan is a personal knowledge management system. Prior to version 3.5.5, the /api/file/copyFile endpoint does not validate the dest parameter, allowing authenticated users to write files to arbitrary locations on the filesystem. This can lead to Remote Code Execution (RCE) by writing to sensitive locations such as cron jobs, SSH authorized_keys, or shell configuration files. This issue has been patched in version 3.5.5.

Detalles CVE

Puntuacion CVSS v3.19.1

SeveridadCRITICAL

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosHIGH

Interaccion usuarioNONE

Publicado2/4/2026

Ultima modificacion2/11/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

b3log:siyuan

Debilidades (CWE)

CWE-22

Referencias

https://github.com/siyuan-note/siyuan/commit/d7f790755edf8c78d2b4176171e5a0cdcd720feb(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c4jr-5q7w-f6r9(security-advisories@github.com)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c4jr-5q7w-f6r9(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlaciones IOC

Sin correlaciones registradas

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