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CVE-2021-23827

MEDIUM
5.5
CVSS Score
Published: February 22, 2021 at 11:07 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorKeybase· also runs on 3 platforms

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%

Description

Keybase Desktop Client before 5.6.0 on Windows and macOS, and before 5.6.1 on Linux, allows an attacker to obtain potentially sensitive media (such as private pictures) in the Cache and uploadtemps directories. It fails to effectively clear cached pictures, even after deletion via normal methodology within the client, or by utilizing the "Explode message/Explode now" functionality. Local filesystem access is needed by the attacker.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Keybase· Keybase
95%
v < 5.6.0v < 5.6.1
Affected range stops below 5.6.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.6.1, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · microsoft-windows (environment) · redhat-linux (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/keybase/client/releases
x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1074930
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://johnjhacking.com/blog/cve-2021-23827/

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-312

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