Unsafe HTTP Redirect in Puppet Agent and Puppet Server

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.014, the 72nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 2 Dec 2021. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-93j5-g845-9wqp
• OSV: GHSA-93j5-g845-9wqp
• nvd.nist.gov/vuln/detail/CVE-2021-27023
• github.com/puppetlabs/puppet
• github.com/rubysec/ruby-advisory-db/blob/master/gems/puppet/CVE-2021-27023.yml
• lists.fedoraproject.org/archives/list/[email protected]/message/62SELE7EKVKZL4GABFMVYMIIUZ7FPEF7
• puppet.com/security/cve/CVE-2021-27023

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.