HighGHSA-6gjf-7w99-j7x7CVE-2021-41126
Deleted Admin Can Sign In to Admin Interface
Published 6 Oct 2021 · Updated 8 Jul 2026
Affected packages
october/octoberComposer
- Affected
- >=2.1.0 <2.1.12
- Fixed in
- 2.1.12
Update to the fixed version for your release line, for example:
composer require october/october:^2.1.12october/systemComposer
- Affected
- >=2.1.0 <2.1.12
- Fixed in
- 2.1.12
Update to the fixed version for your release line, for example:
composer require october/system:^2.1.12Details
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:
- Email us at [hello@octobercms.com](mailto:hello@octobercms.com)
Is GHSA-6gjf-7w99-j7x7 in any of your client repos?
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References
Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.