CVE-2021-22906
MEDIUM
6.5
CVSS Score
Published: June 11, 2021 at 03:49 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
1 product affected across 1 vendorEnd To End Encryption
Using Nextcloud End-to-End Encryption by N/A?
Get instant alerts when new vulnerabilities affect Nextcloud End-to-End Encryption - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%
Description
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
End To End Encryption· Nextcloudnextcloud-app
95%v < 1.5.31.6.0 ≤ v < 1.6.31.7.0 ≤ v < 1.7.1
Vendor states this is fixed in 1.5.3 (unaffected)
Affected range stops below 1.6.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.7.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3829-45wm-ww36x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1189174CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-400CWE-639
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card