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Missing input sanitization and possible privilege escalation through ldap search query injection

High
Meierschlumpf published GHSA-59gp-q3xx-489q Dec 17, 2025

Package

ghcr.io/homarr-labs/homarr (Docker image)

Affected versions

<=1.45.2

Patched versions

>=1.45.3

Description

Impact

Through this vulnerability it was possible to craft an input which allowed privilege escalation and getting access to groups of other users due to missing sanitization of inputs in ldap search query. It can impact all instances using ldap authentication where a malicious actor has access to a user account.

Patches

Version: >=1.45.3

  • Validate input to not contain characters used in ldap search query.
  • Check that only one user matches the query for finding the user.

Workarounds

Disable LDAP authentication, but then of course you can no longer login

References

https://wiki.owasp.org/index.php/Preventing_LDAP_Injection_in_Java

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L

CVE ID

CVE-2025-67493

Weaknesses

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Learn more on MITRE.

Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. Learn more on MITRE.

Credits