CVE-2024-24817: calendar Information Disclosure — Fix

Description

Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on the open-source discussion platform Discourse. Prior to version 0.4, event invitees created in topics in private categories or PMs (private messages) can be retrieved by anyone, even if they're not logged in. This problem is resolved in version 0.4 of the discourse-calendar plugin. While no known workaround is available, putting the site behind `login_required` will disallow this endpoint to be used by anonymous users, but logged in users can still get the list of invitees in the private topics.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-200 CWE-200

Affected Products

Vendor	Product	Versions
discourse	calendar	< 0.4

References

Advisories & Patches

https://github.com/discourse/discourse-calendar/commit/84ef46a38cf02748ecacad16c5d9c6fec12dc8da https://github.com/discourse/discourse-calendar/security/advisories/GHSA-wwq5-g5cp-c69f https://github.com/discourse/discourse-calendar/commit/84ef46a38cf02748ecacad16c5d9c6fec12dc8da https://github.com/discourse/discourse-calendar/security/advisories/GHSA-wwq5-g5cp-c69f

Frequently Asked Questions

What is CVE-2024-24817? +

Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on the open-source discussion platform Discourse. Prior to version 0.4, event invitees created in topics in private categories or PMs (private messages) can be retrieved by anyone, even if they're not logged in. This problem is resolved in version 0.4 of the discourse-calendar plugin. While no known workaround is available, putting the site behind `login_required` will disallow this endpoint to be used by anonymous users, but logged in users can still get the list of invitees in the private topics. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2024-24817? +

CVE-2024-24817 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-24817? +

CVE-2024-24817 affects products from discourse, specifically: calendar. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-24817? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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