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Case File

CVE-2021-21265

MEDIUM · CVSS 6.8 EPSS 1.75% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-03-10 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.8. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-21265
Severity
MEDIUM
CVSS
6.8
EPSS
1.75%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)