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Deleted Admin Can Sign In to Admin Interface

High severity GitHub Reviewed Published Oct 6, 2021 in octobercms/october • Updated Jan 27, 2023

Package

composer october/october (Composer)

Affected versions

>= 2.1.0, < 2.1.12

Patched versions

2.1.12
composer october/system (Composer)
>= 2.1.0, < 2.1.12
2.1.12

Description

Impact

Assuming an administrator once had previous access to the admin interface, they may still be able to sign in to the backend using October CMS v2.0.

Patches

The issue has been patched in v2.1.12

Workarounds

  • Reset the password of the deleted accounts to prevent them from signing in.

  • Please contact hello@octobercms.com for code change instructions if you are unable to upgrade.

References

Credits to:
• Daniel Bidala

For more information

If you have any questions or comments about this advisory:

References

@daftspunk daftspunk published to octobercms/october Oct 6, 2021
Reviewed Oct 6, 2021
Published to the GitHub Advisory Database Oct 6, 2021
Published by the National Vulnerability Database Oct 6, 2021
Last updated Jan 27, 2023

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
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.104%
(44th percentile)

Weaknesses

CVE ID

CVE-2021-41126

GHSA ID

GHSA-6gjf-7w99-j7x7

Source code

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