Vulnerability · Published Jan 27, 2023 · Assigned by GitHub_M

CVE-2023-23624Discourse's exclude_tags param could leak which topics had a specific hidden tag

Medium 4.3

In plain English

A medium-severity information exposure in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.6%top 51.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	< 3.0.1= 3.1.0.beta1

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/discourse/discourse/security/advisories/GHSA-qgj5-g5vf-fm7q x_refsource_CONFIRM
https://github.com/discourse/discourse/pull/20006 x_refsource_MISC
https://github.com/discourse/discourse/commit/f55e0fe7910149c431861c18ce407d1be0d6091a x_refsource_MISC