CVE-2023-23622CWE-200

Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users

Medium · published March 17, 2023

CVSS v3.1
4.3
EPSS
1%
Percentile
44.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00534 · 44.3th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2023-03-17T14:17Z
EPSS history
Timeline
  • 17 MAR 14:17Z
    Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users
    cvelistv5