CVE-2026-25539

CRITICAL

9.1

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.19.1

SeveridadeCRITICAL

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosHIGH

Interacao do usuarioNONE

Publicado2/4/2026

Ultima modificacao2/11/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

b3log:siyuan

Fraquezas (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)

Correlacoes IOC

Sem correlacoes registradas

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