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CVE-2026-33355

MEDIUM

6.5

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/19/2026

Last Modified3/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-200

References

https://github.com/discourse/discourse/commit/84e5865a279716c6866e8c0648d1d8b42320603c(security-advisories@github.com)

https://github.com/discourse/discourse/commit/d25b8ee9ee182dbb34e92b34e39878ce4d59bcdc(security-advisories@github.com)

https://github.com/discourse/discourse/commit/d2f317271ad7638f1e2791905472ebd9370946d1(security-advisories@github.com)

https://github.com/discourse/discourse/security/advisories/GHSA-g4v5-6gfp-3hjq(security-advisories@github.com)

IOC Correlations

No correlations recorded

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