CVE-2023-23935

Presence of restricted personal Discourse messages may be leaked if tagged with a tag

Description

Discourse is an open-source messaging platform. In versions 3.0.1 and prior on the `stable` branch and versions 3.1.0.beta2 and prior on the `beta` and `tests-passed` branches, the count of personal messages displayed for a tag is a count of all personal messages regardless of whether the personal message is visible to a given user. As a result, any users can technically poll a sensitive tag to determine if a new personal message is created even if the user does not have access to the personal message. In the patched versions, the count of personal messages tagged with a given tag is hidden by default. To revert to the old behaviour of displaying the count of personal messages for a given tag, an admin may enable the `display_personal_messages_tag_counts` site setting.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.25%
Vendor Advisory github.com
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-rf8j-mf8c-82v7 vendor advisory
https://github.com/discourse/discourse/commit/f31f0b70f82c43d93220ce6fc0d4f57440452f37 patch

Frequently Asked Questions

What is the severity of CVE-2023-23935?
CVE-2023-23935 has been scored as a low severity vulnerability.
How to fix CVE-2023-23935?
To fix CVE-2023-23935, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-23935 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-23935 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-23935?
CVE-2023-23935 affects discourse discourse.
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