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High, CVSS 7.5

Local File Inclusion by unauthenticated users

CVE-2020-15246GHSA-xwjr-6fj7-fc6h

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (october/cms 1.0.469), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist october/cms

    Affected
    >= 1.0.421, < 1.0.469
    Fixed in
    1.0.469

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2020-15246: 1.70% estimated exploitation activity in the next 30 days; percentile 77.22 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact An attacker can exploit this vulnerability to read local files on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. Patches Issue has been patched in Build 469 (v1.0.469) and v1.1.0. Workarounds Apply https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f362aa4 to your installation manually if unable to upgrade to Build 469. References Reported by ka1n4t For more information If you have any questions or comments about this advisory: Email us at hello@octobercms.com Threat assessment: <img width="1105" alt="Screen Shot 2020-10-10 at 1 05 19 PM" src="https://user-images.githubusercontent.com/7253840/95663086-4ffc4780-0af9-11eb-9bb6-fd40cf11c033.png"

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-xwjr-6fj7-fc6h

Agent brief

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# Patch Next advisory brief: CVE-2020-15246

Advisory: Local File Inclusion by unauthenticated users
IDs: CVE-2020-15246, GHSA-xwjr-6fj7-fc6h
Record: https://patchnext.com/advisories/cve-2020-15246 (revision 1, source checked 26 Oct 2026, 14:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: october/cms 1.0.469. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist october/cms: affected >= 1.0.421, < 1.0.469; fixed in 1.0.469

## Suggested inspection (read-only)
- Packagist october/cms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on october/cms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xwjr-6fj7-fc6h (GitHub-reviewed advisory GHSA-xwjr-6fj7-fc6h lists affected ranges: Packagist october/cms >=1.0.421 <1.0.469)

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