low
2.7
CWE
400
Advisory Published
Updated

CVE-2023-28440: Denial of service via admin theme import route in Discourse

First published: Tue Apr 18 2023(Updated: )

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untrusted. This issue has been addressed in versions 3.0.3 and 3.1.0.beta4. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
Discourse<3.0.3
Discourse=1.1.0-beta1
Discourse=1.1.0-beta2
Discourse=1.1.0-beta3
Discourse=1.1.0-beta4
Discourse=1.1.0-beta5
Discourse=1.1.0-beta6
Discourse=1.1.0-beta6b
Discourse=1.1.0-beta7
Discourse=1.1.0-beta8
Discourse=1.2.0-beta1
Discourse=1.2.0-beta2
Discourse=1.2.0-beta3
Discourse=1.2.0-beta4
Discourse=1.2.0-beta5
Discourse=1.2.0-beta6
Discourse=1.2.0-beta7
Discourse=1.2.0-beta8
Discourse=1.2.0-beta9
Discourse=1.3.0-beta1
Discourse=1.3.0-beta10
Discourse=1.3.0-beta11
Discourse=1.3.0-beta2
Discourse=1.3.0-beta3
Discourse=1.3.0-beta4
Discourse=1.3.0-beta5
Discourse=1.3.0-beta6
Discourse=1.3.0-beta7
Discourse=1.3.0-beta8
Discourse=1.3.0-beta9
Discourse=1.4.0-beta1
Discourse=1.4.0-beta10
Discourse=1.4.0-beta11
Discourse=1.4.0-beta12
Discourse=1.4.0-beta2
Discourse=1.4.0-beta3
Discourse=1.4.0-beta4
Discourse=1.4.0-beta5
Discourse=1.4.0-beta6
Discourse=1.4.0-beta7
Discourse=1.4.0-beta8
Discourse=1.4.0-beta9
Discourse=1.5.0-beta1
Discourse=1.5.0-beta10
Discourse=1.5.0-beta11
Discourse=1.5.0-beta12
Discourse=1.5.0-beta13
Discourse=1.5.0-beta13b
Discourse=1.5.0-beta14
Discourse=1.5.0-beta2
Discourse=1.5.0-beta3
Discourse=1.5.0-beta4
Discourse=1.5.0-beta5
Discourse=1.5.0-beta6
Discourse=1.5.0-beta7
Discourse=1.5.0-beta8
Discourse=1.5.0-beta9
Discourse=1.6.0-beta1
Discourse=1.6.0-beta10
Discourse=1.6.0-beta11
Discourse=1.6.0-beta12
Discourse=1.6.0-beta2
Discourse=1.6.0-beta3
Discourse=1.6.0-beta4
Discourse=1.6.0-beta5
Discourse=1.6.0-beta6
Discourse=1.6.0-beta7
Discourse=1.6.0-beta8
Discourse=1.6.0-beta9
Discourse=1.7.0-beta1
Discourse=1.7.0-beta10
Discourse=1.7.0-beta11
Discourse=1.7.0-beta2
Discourse=1.7.0-beta3
Discourse=1.7.0-beta4
Discourse=1.7.0-beta5
Discourse=1.7.0-beta6
Discourse=1.7.0-beta7
Discourse=1.7.0-beta8
Discourse=1.7.0-beta9
Discourse=1.8.0-beta1
Discourse=1.8.0-beta10
Discourse=1.8.0-beta11
Discourse=1.8.0-beta12
Discourse=1.8.0-beta13
Discourse=1.8.0-beta2
Discourse=1.8.0-beta3
Discourse=1.8.0-beta4
Discourse=1.8.0-beta5
Discourse=1.8.0-beta6
Discourse=1.8.0-beta7
Discourse=1.8.0-beta8
Discourse=1.8.0-beta9
Discourse=1.9.0-beta1
Discourse=1.9.0-beta10
Discourse=1.9.0-beta11
Discourse=1.9.0-beta12
Discourse=1.9.0-beta13
Discourse=1.9.0-beta14
Discourse=1.9.0-beta15
Discourse=1.9.0-beta16
Discourse=1.9.0-beta17
Discourse=1.9.0-beta2
Discourse=1.9.0-beta3
Discourse=1.9.0-beta4
Discourse=1.9.0-beta5
Discourse=1.9.0-beta6
Discourse=1.9.0-beta7
Discourse=1.9.0-beta8
Discourse=1.9.0-beta9
Discourse=2.0.0-beta1
Discourse=2.0.0-beta10
Discourse=2.0.0-beta2
Discourse=2.0.0-beta3
Discourse=2.0.0-beta4
Discourse=2.0.0-beta5
Discourse=2.0.0-beta6
Discourse=2.0.0-beta7
Discourse=2.0.0-beta8
Discourse=2.0.0-beta9
Discourse=2.1.0-beta1
Discourse=2.1.0-beta2
Discourse=2.1.0-beta3
Discourse=2.1.0-beta4
Discourse=2.1.0-beta5
Discourse=2.1.0-beta6
Discourse=2.2.0-beta1
Discourse=2.2.0-beta10
Discourse=2.2.0-beta2
Discourse=2.2.0-beta3
Discourse=2.2.0-beta4
Discourse=2.2.0-beta5
Discourse=2.2.0-beta6
Discourse=2.2.0-beta7
Discourse=2.2.0-beta8
Discourse=2.2.0-beta9
Discourse=2.3.0-beta1
Discourse=2.3.0-beta10
Discourse=2.3.0-beta11
Discourse=2.3.0-beta2
Discourse=2.3.0-beta3
Discourse=2.3.0-beta4
Discourse=2.3.0-beta5
Discourse=2.3.0-beta6
Discourse=2.3.0-beta7
Discourse=2.3.0-beta8
Discourse=2.3.0-beta9
Discourse=2.4.0-beta1
Discourse=2.4.0-beta10
Discourse=2.4.0-beta11
Discourse=2.4.0-beta2
Discourse=2.4.0-beta3
Discourse=2.4.0-beta4
Discourse=2.4.0-beta5
Discourse=2.4.0-beta6
Discourse=2.4.0-beta7
Discourse=2.4.0-beta8
Discourse=2.4.0-beta9
Discourse=2.5.0-beta1
Discourse=2.5.0-beta2
Discourse=2.5.0-beta3
Discourse=2.5.0-beta4
Discourse=2.5.0-beta5
Discourse=2.5.0-beta6
Discourse=2.5.0-beta7
Discourse=2.6.0-beta1
Discourse=2.6.0-beta2
Discourse=2.6.0-beta3
Discourse=2.6.0-beta4
Discourse=2.6.0-beta5
Discourse=2.6.0-beta6
Discourse=2.7.0-beta1
Discourse=2.7.0-beta2
Discourse=2.7.0-beta3
Discourse=2.7.0-beta4
Discourse=2.7.0-beta5
Discourse=2.7.0-beta6
Discourse=2.7.0-beta7
Discourse=2.7.0-beta8
Discourse=2.7.0-beta9
Discourse=2.8.0-beta1
Discourse=2.8.0-beta10
Discourse=2.8.0-beta11
Discourse=2.8.0-beta2
Discourse=2.8.0-beta3
Discourse=2.8.0-beta4
Discourse=2.8.0-beta5
Discourse=2.8.0-beta6
Discourse=2.8.0-beta7
Discourse=2.8.0-beta8
Discourse=2.8.0-beta9
Discourse=2.9.0-beta1
Discourse=2.9.0-beta10
Discourse=2.9.0-beta11
Discourse=2.9.0-beta12
Discourse=2.9.0-beta13
Discourse=2.9.0-beta14
Discourse=2.9.0-beta2
Discourse=2.9.0-beta3
Discourse=2.9.0-beta4
Discourse=2.9.0-beta5
Discourse=2.9.0-beta6
Discourse=2.9.0-beta7
Discourse=2.9.0-beta8
Discourse=2.9.0-beta9
Discourse=3.0.0-beta15
Discourse=3.0.0-beta16
Discourse=3.1.0-beta1
Discourse=3.1.0-beta2
Discourse=3.1.0-beta3

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-28440?

    The severity of CVE-2023-28440 is considered moderate, primarily affecting Discourse administrators.

  • How do I fix CVE-2023-28440?

    To fix CVE-2023-28440, update your Discourse installation to version 3.0.4 or later.

  • What are the affected versions of Discourse for CVE-2023-28440?

    Affected versions of Discourse for CVE-2023-28440 include all versions prior to 3.0.4.

  • Could shared hosting environments be at risk due to CVE-2023-28440?

    Yes, shared hosting environments are particularly at risk due to the exploitability of this vulnerability.

  • What type of vulnerability is CVE-2023-28440?

    CVE-2023-28440 is a denial-of-service vulnerability related to long-running requests from administrators.

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