Backdrop core - Critical - Third-party libraries - BACKDROP-SA-CORE-2021-001

Backdrop core - Critical - Third-party libraries - BACKDROP-SA-CORE-2021-001

Date: Wednesday, Jan 27th, 2021
Security risk: Critical
Advisory ID: BACKDROP-SA-CORE-2021-001
CVE ID: CVE-2020-36193
Vulnerability: Third Party Libraries
Versions affected: Backdrop Core 1.18.x versions prior to 1.18.1, Backdrop Core 1.17.x versions prior to 1.17.6
Backdrop versions 1.16 and prior do not receive security coverage.


The Backdrop project uses the pear Archive_Tar library, which has released a security update that impacts Backdrop. For more information please see:


Exploits may be possible if Backdrop is configured to allow .tar, .tar.gz, .bz2, or .tlz file uploads and processes them, or if the Installer module is enabled.


Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.18.1 release page. See the update instructions, if needed.

If you are hosted with AltaGrade, then please just create a support ticket and we will gladly run this upgrade for you.

Nick Onom's picture
Nick Onom
Marketing Project Manager
Enthusiastic about all kinds of Open Source applications, AI, bitcoins, but mostly Drupal and Backdrop. For last years has been actively developing AltaGrade's new back-end system.

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