Fiche vulnérabilité
CVE-2026-25539 : faille élevée b3log siyuan (CVSS 7.2)
Description
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.
En bref
- Sévérité
- Élevée (CVSS 7.2)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 4 févr. 2026
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- b3log siyuan