Discourse is an open-source community discussion platform. In versions 3.5.0 and below, malicious meta-commands could be embedded in a backup dump and executed during restore. In multisite setups, this allowed an admin of one site to access data or credentials from other sites. This issue is fixed in version 3.5.1.
https://github.com/discourse/discourse/security/advisories/GHSA-7xjr-4f4g-9887
https://github.com/discourse/discourse/commit/43536b60d012cc8084e7e701d6afab9ba01e28a5
Published: 2025-10-01
Updated: 2025-10-16
Base Score: 6.1
Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:N/A:N
Severity: Medium
Base Score: 6.8
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
Severity: Medium
EPSS: 0.00043