CVE-2026-45775 Discourse: Cross-site backup access via path traversal in multisite local backups

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 path traversal vulnerability in Discourse backup handling could allow an authenticated administrator on one site in a...

CVE-2026-45775

Discourse, a multi-site capable open-source discussion platform, has a path traversal vulnerability in its backup handling that could let an authenticated administrator on one site access backup files from another site on the same host. Affected version ranges include 2026.1.0-latest up to before...

CVE-2025-59337 Discourse: Cross-Site Data Exposure via Backup Restore Metacommand Injection in Multisite Deployments

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 fixe...