vulnerability / NVI-00006395 / Revision 3
October CMS auth bypass and account takeover
OSV carries this publisher advisory for october/system, october/system. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.8 MEDIUM (2.0)
nvd@nist.gov severity; no combined Null risk score.
7.4 HIGH (3.1)
security-advisories@github.com severity; no combined Null risk score.
0.895%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.59517. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
october/system
source listedECOSYSTEM: introduced 0; fixed 1.0.472
### Impact An attacker can exploit this vulnerability to bypass authentication using a specially crafted persist cookie. - To exploit this vulnerability, an attacker must obtain a Laravel’s secret key for cookie encryption and signing. - Due to the logic of how this mechanism works, a targeted user account must be logged in while the attacker is exploiting the vulnerability. - Authorization via persist cookie not shown in access logs. ### Patches - Issue has been patched in Build 472 and v1.1.5 - Shortened patch instructions ### Workarounds Apply https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374 and https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9 to your installation manually if you are unable to upgrade. [**Update 2022-01-20**] Shortened patch instructions can be found here. ### Recommendations We recommend the following steps to make sure your server stays secure: - Keep server OS and system software up to date. - Keep October CMS software up to date. - Use a multi-factor authentication plugin. - Change t
october/system
source listedECOSYSTEM: introduced 1.1.1; fixed 1.1.5
### Impact An attacker can exploit this vulnerability to bypass authentication using a specially crafted persist cookie. - To exploit this vulnerability, an attacker must obtain a Laravel’s secret key for cookie encryption and signing. - Due to the logic of how this mechanism works, a targeted user account must be logged in while the attacker is exploiting the vulnerability. - Authorization via persist cookie not shown in access logs. ### Patches - Issue has been patched in Build 472 and v1.1.5 - Shortened patch instructions ### Workarounds Apply https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374 and https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9 to your installation manually if you are unable to upgrade. [**Update 2022-01-20**] Shortened patch instructions can be found here. ### Recommendations We recommend the following steps to make sure your server stays secure: - Keep server OS and system software up to date. - Keep October CMS software up to date. - Use a multi-factor authentication plugin. - Change t
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 1.0.472 for october/system. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 1.1.5 for october/system. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-h76r-vgf3-j6w5 ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2021-29487 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2021-29487 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 3 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.