CVE-2020-26214

LDAP authentication bypass in Alerta

CRITICAL
9.8
CVSS Score
Published: November 6, 2020 at 05:50 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorAlerta

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Severity
CRITICAL9.8
Exploit prediction
EPSS 66%

Description

In Alerta before version 8.1.0, users may be able to bypass LDAP authentication if they provide an empty password when Alerta server is configure to use LDAP as the authorization provider. Only deployments where LDAP servers are configured to allow unauthenticated authentication mechanism for anonymous authorization are affected. A fix has been implemented in version 8.1.0 that returns HTTP 401 Unauthorized response for any authentication attempts where the password field is empty. As a workaround LDAP administrators can disallow unauthenticated bind requests by clients.

Affected

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

v < 7.5.7v < 8.1.08.0.0 ≤ v < 8.1.0
Affected range stops below 7.5.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-287

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