Deleted Admin Can Sign In to Admin Interface

published 2021-10-06 5 y ago modified 2026-07-08 4 mo ago also GHSA-6gjf-7w99-j7x7 , EUVD-2021-2170

cvss: 7.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

October is a Content Management System (CMS) and web platform built on the the Laravel PHP Framework. In affected versions administrator accounts which had previously been deleted may still be able to sign in to the backend using October CMS v2.0. The issue has been patched in v2.1.12 of the october/october package. There are no workarounds for this issue and all users should update.

Patch / fix

fixed in 3

packagist october/october 2.1.12
packagist october/system 2.1.12
octobercms october 2.1.12

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	october/october	>=2.1.0, <2.1.12	2.1.12
packagist	october/system	>=2.1.0, <2.1.12	2.1.12

Affected products

octobercms october

Classification

Weakness

CWE-287 Improper Authentication

References

octobercms.com /changelog
web, release-notes, vendor-advisory
github.com /octobercms/october/security/advisories/GHSA-6gjf-7w99-j7x7
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-41126
advisory
github.com /octobercms/october
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary