4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
35.8%
Discourse is an open-source discussion platform. Prior to version 3.0.1 of the stable
branch and version 3.1.0.beta2 of the beta
and tests-passed
branches, the count of topics displayed for a tag is a count of all regular topics regardless of whether the topic is in a read restricted category or not. As a result, any users can technically poll a sensitive tag to determine if a new topic is created in a category which the user does not have excess to.
In version 3.0.1 of the stable
branch and version 3.1.0.beta2 of the beta
and tests-passed
branches, the count of topics displayed for a tag defaults to only counting regular topics which are not in read restricted categories. Staff users will continue to see a count of all topics regardless of the topic’s category read restrictions.
github.com/discourse/discourse/commit/105fee978d73b0ec23ff814a09d1c0c9ace95164
github.com/discourse/discourse/commit/ecb9aa5dba94741d9579f4f873f0675f48b4184f
github.com/discourse/discourse/pull/20004
github.com/discourse/discourse/pull/20005
github.com/discourse/discourse/security/advisories/GHSA-2wvr-4x7w-v795
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
35.8%