CVE-2026-30889 | BDVDB-2026-321505 Detail

discoursediscourse

Description#

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a moderator could exploit insufficient authorization checks to access metadata of posts they should not have permission to view. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.

Impact#

Per CVSS v4.0: confidentiality impact low, integrity impact none, availability impact none. Attack vector: network.

Weaknesses#

CWE-862 Missing Authorization

References#

https://github.com/discourse/discourse/security/advisories/GHSA-5qm9-r98f-g4mq

Exploit#

No public exploit known

History#

Version 12026-03-20Record published in the CVE List.

Published

Published: 2026-03-20
Last modified: 2026-03-20

Vendor information

Vendor: discourse
Product: discourse

All discourse vulnerabilities

Score

5.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 22.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Missing Authorization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2026.1.0-latest, < 2026.1.2
Fixed
Not stated
Vulnerable
>= 2026.2.0-latest, < 2026.2.1
Fixed
Not stated
Vulnerable
= 2026.3.0-latest.1
Fixed
Not stated

Scoring System

CVSS v4.0

5.3 Medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	Low
User Interaction	None
Vulnerable System Confidentiality	Low
Vulnerable System Integrity	None
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).