CVE-2021-21265
October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers
- State
- Published
- Severity
- 6.8 Medium
- Published
- Mar 10, 2021
- Updated
- May 29, 2025
- Reserved
- Dec 22, 2020
Description
October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October before version 1.1.2, when running on poorly configured servers (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. This has been addressed in version 1.1.2 by adding a feature to allow a set of trusted hosts to be specified in the application. As a workaround one may set the configuration setting cms.linkPolicy to force.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N | GitHub_M |
Weaknesses
- CWE-644 Improper Neutralization of HTTP Headers for Scripting Syntax
Affected Products
| Product | Versions |
|---|---|
octoberoctobercms |
|
References
- https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp
- https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d
- https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6
- https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30
- https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0
- https://packagist.org/packages/october/backend
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