CVE-2023-23624

Discourse's exclude_tags param could leak which topics had a specific hidden tag

Description

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches, someone can use the `exclude_tag param` to filter out topics and deduce which ones were using a specific hidden tag. This affects any Discourse site using hidden tags in public categories. This issue is patched in version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches. As a workaround, secure any categories that are using hidden tags, change any existing hidden tags to not include private data, or remove any hidden tags currently in use.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.09%
Third-Party Advisory github.com
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-qgj5-g5vf-fm7q third party advisory
https://github.com/discourse/discourse/pull/20006 patch issue tracking
https://github.com/discourse/discourse/commit/f55e0fe7910149c431861c18ce407d1be0d6091a patch

Frequently Asked Questions

What is the severity of CVE-2023-23624?
CVE-2023-23624 has been scored as a medium severity vulnerability.
How to fix CVE-2023-23624?
To fix CVE-2023-23624, 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-2023-23624 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-23624 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-2023-23624?
CVE-2023-23624 affects discourse discourse.
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