synced 13 MIN AGO
01 Record

CVE-2021-22877

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

UnratedPUBLISHEDCNA: hackerone
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.68% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 76.5% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-03-03 17:39Z5 YR AGO
Last updated
2024-08-03 18:51Z2 YR AGO
Reserved
2021-01-06
Assigning CNA
hackerone
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.1
Document digest
73665edb3f4e8c46f1cadcc9d447dd0b10b832a762ea3aee1b543714a8902238

05 Affected products

VendorProductVersionsPlatforms
n/aNextcloud ServerFixed in 20.0.6—

06 References