Discourse up to 3.1.2/3.2.0.beta2 Bookmark Reminder information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in Discourse up to 3.1.2/3.2.0.beta2. This issue affects some unknown processing of the component Bookmark Reminder. Such manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2023-45816. Local access is required to approach this attack. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Discourse up to 3.1.2/3.2.0.beta2. It has been rated as problematic. Affected by this issue is an unknown functionality of the component Bookmark Reminder. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

Discourse is an open source platform for community discussion. Prior to version 3.13 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, there is an edge case where a bookmark reminder is sent and an unread notification is generated, but the underlying bookmarkable (e.g. post, topic, chat message) security has changed, making it so the user can no longer access the underlying resource. As of version 3.13 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, bookmark reminders are now no longer sent if the user does not have access to the underlying bookmarkable, and also the unread bookmark notifications are always filtered by access. There are no known workarounds.

The weakness was disclosed 11/10/2023. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-45816 since 10/13/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.1.3 or 3.2.0.beta3 eliminates this vulnerability.

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Productinfo

Type

• Chat Software

Name

• Discourse

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.2.0.beta1
• 3.2.0.beta2

License

• open-source

Website

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

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