SB2026070152 - Multiple vulnerabilities in Discourse

Description

This security bulletin contains information about 2 vulnerabilities.

1) Authorization bypass through user-controlled key (CVE-ID: CVE-2025-58055)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in the AI suggestion endpoints for topic title, category, and tags when handling API requests with a modified topic_id value. A remote user can send a specially crafted request to disclose sensitive information.

The issue affects access to information about restricted topics through AI-generated responses.

2) Command injection (CVE-ID: CVE-2025-59337)

CWE-ID: CWE-77 - Command injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to command injection in the backup restore functionality when restoring a crafted backup dump containing malicious meta-commands. A remote user can embed malicious meta-commands in a backup dump to disclose sensitive information.

In multisite environments, exploitation can allow access to data or credentials from other sites.

Remediation

Install update from vendor's website.

References

• https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr
• https://github.com/discourse/discourse/security/advisories/GHSA-7xjr-4f4g-9887