CVE-2021-39172

New line injection during configuration edition

HIGH
8.8
CVSS Score
Published: August 27, 2021 at 10:50 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
2 products affected across 2 vendorsCatchetCachet

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Severity
HIGH8.8
Exploit prediction
EPSS 29%

Description

Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

Affected

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

v < 2.5.1
Affected range stops below 2.5.1, so it looks safe — our inference, not a vendor statement
v < 2.5.1
Affected range stops below 2.5.1, so it looks safe — our inference, not a vendor statement

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.

CVSS

8.8HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-93

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