Overview
- Description
- Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.
- Source
- support@hackerone.com
- NVD status
- Modified
Risk scores
CVSS 3.0
- Type
- Primary
- Base score
- 4.3
- Impact score
- 1.4
- Exploitability score
- 2.8
- Vector string
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 4
- Impact score
- 2.9
- Exploitability score
- 8
- Vector string
- AV:N/AC:L/Au:S/C:N/I:P/A:N
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D6E3F368-B854-430E-AB8F-496675C4E210",
"versionEndExcluding": "9.0.54"
},
{
"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:10.0:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A11A2099-3AEC-4622-9ADE-085740EE67C7"
}
],
"operator": "OR"
}
]
}
]