CVE-2023-23622 json
Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users
published 2023-03-17 3 y ago modified 2026-09-08 2 mo ago also BIT-discourse-2023-23622 , EUVD-2023-27716 , GHSA-2wvr-4x7w-v795
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami discourse 3.0.0
- discourse discourse 3.0.0
- github.com/discourse/discourse@105fee9 commit
- github.com/discourse/discourse@ecb9aa5 commit
- github.com/discourse/discourse#20004 pull request
- github.com/discourse/discourse#20005 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <3.0.0 |
3.0.0 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/discourse/discourse/pull/20004
issue-tracking, patch
-
github.com
/discourse/discourse/pull/20005
issue-tracking, report
-
github.com
/discourse/discourse/commit/105fee978d73b0ec23ff814a09d1c0c9ace95164
patch
-
github.com
/discourse/discourse/commit/ecb9aa5dba94741d9579f4f873f0675f48b4184f
patch
-
github.com
/discourse/discourse/security/advisories/GHSA-2wvr-4x7w-v795
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-23622
web
Sources
- CVE List CVE-2023-23622
- NVD CVE-2023-23622
- OSV BIT-discourse-2023-23622
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.