CVE-2026-44783CWE-284

Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts

Medium · published June 12, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
15.3
In the wild
Unconfirmed
What it is

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic's staff-only whisper channel. The injected content is visible to whisperers (typically staff) alongside legitimate whispers. Only sites that have whispers enabled are affected. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00249 · 15.3th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-06-12T20:23Z
EPSS history
Timeline
  • 12 JUN 20:23Z
    Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts
    cvelistv5