Discourse up to 2.8.13/2.9.0.beta14 Email Address private personal information

Summaryinfo

A vulnerability, which was classified as problematic, was found in Discourse up to 2.8.13/2.9.0.beta14. The affected element is an unknown function of the component Email Address Handler. Such manipulation leads to private personal information. This vulnerability is referenced as CVE-2022-46168. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Discourse up to 2.8.13/2.9.0.beta14. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Email Address Handler. The manipulation with an unknown input leads to a private personal information vulnerability. Using CWE to declare the problem leads to CWE-359. The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected. Impacted is confidentiality. CVE summarizes:

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 2.9.0.beta15 on the `beta` and `tests-passed` branches, recipients of a group SMTP email could see the email addresses of all other users inside the group SMTP topic. Most of the time this is not an issue as they are likely already familiar with one another's email addresses. This issue is patched in versions 2.8.14 and 2.9.0.beta15. The fix is that someone sending emails out via group SMTP to non-staged users masks those emails with blind carbon copy (BCC). Staged users are ones that have likely only interacted with the group via email, and will likely include other people who were CC'd on the original email to the group. As a workaround, disable group SMTP for any groups that have it enabled.

The weakness was published 01/05/2023 as GHSA-8p7g-3wm6-p3rm. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2022-46168 since 11/28/2022. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1589.

Upgrading to version 2.8.14 or 2.9.0.beta15 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Chat Software

Name

• Discourse

Version

• 2.8.0
• 2.8.1
• 2.8.2
• 2.8.3
• 2.8.4
• 2.8.5
• 2.8.6
• 2.8.7
• 2.8.8
• 2.8.9
• 2.8.10
• 2.8.11
• 2.8.12
• 2.8.13
• 2.9.0.beta14

License

• open-source

Website

• Product: https://github.com/discourse/discourse/

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