CVE-2021-43820

Katalog CVE

CVSS 5.9 · Medium EPSS 0,99%

Kerentanan Authorization Bypass Through User-Controlled Key pada seafile server. Skor CVSS 3.1 5.9 (Medium) menurut NVD.

Deskripsi (NVD)

Seafile is an open source cloud storage system. A sync token is used in Seafile file syncing protocol to authorize access to library data. To improve performance, the token is cached in memory in seaf-server. Upon receiving a token from sync client or SeaDrive client, the server checks whether the token exist in the cache. However, if the token exists in cache, the server doesn't check whether it's associated with the specific library in the URL. This vulnerability makes it possible to use any valid sync token to access data from any **known** library. Note that the attacker has to first find out the ID of a library which it has no access to. The library ID is a random UUID, which is not possible to be guessed. There are no workarounds for this issue.

Rincian

Terbit di NVD

14 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

5.9 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-639: Authorization Bypass Through User-Controlled Key

EPSS (30 hari)

0,99% peluang dieksploitasi; lebih tinggi dari 61,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/haiwen/seafile-server/pull/520 patch · advisory pihak ketiga
• https://github.com/haiwen/seafile-server/security/advisories/GHSA-m3wc-jv6r-hvv8 advisory pihak ketiga