CVE-2021-21265: October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers

CVE-2021-21265 · Severity: info · Published 2021-03-10

October CMS vulnerable to Potential Host Header Poisoning on misconfigured servers

Technologies: october/backend (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2021-21265 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-21265 being exploited in the wild.
How severe is CVE-2021-21265?
Informational severity, published 10 March 2021.
Which products and versions are affected?
october/backend (Packagist) ECOSYSTEM:introduced=0,fixed=1.1.2.
Is there a fix for CVE-2021-21265?
Yes. october/backend (Packagist): upgrade to 1.1.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-21265?
Check whether you run october/backend (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • october/backend (Packagist): upgrade to 1.1.2 or later
    composer require october/backend:^1.1.2

Affected products

  • october/backend (Packagist) ECOSYSTEM:introduced=0,fixed=1.1.2

Identifiers

  • CVE-2021-21265
  • GHSA-xhfx-hgmf-v6vp

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