Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-48053
CVE-2025-48053:
Discourse vulnerability analysis and mitigation
Overview
Discourse, an open-source discussion platform, was found to contain a vulnerability (CVE-2025-48053) that affects versions prior to 3.4.4 of the 'stable' branch, 3.5.0.beta5 of the 'beta' branch, and 3.5.0.beta6-dev of the 'tests-passed' branch. The vulnerability was discovered and disclosed on June 9, 2025, where sending a malicious URL in a private message (PM) to a bot user could reduce the availability of a Discourse instance (GitHub Advisory).
Technical details
The vulnerability has been assigned a CVSS v4.0 base score of 8.7 (HIGH) with the vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N. The vulnerability is classified under CWE-400 (Uncontrolled Resource Consumption) and CWE-770 (Allocation of Resources Without Limits or Throttling). The attack vector is network-accessible, requires low attack complexity, no special privileges, and no user interaction (GitHub Advisory, NVD).
Impact
When successfully exploited, this vulnerability can lead to reduced availability of the affected Discourse instance. The impact is primarily focused on system availability, with no direct effect on confidentiality or integrity of the system (GitHub Advisory).
Mitigation and workarounds
The vulnerability has been patched in version 3.4.4 of the 'stable' branch, version 3.5.0.beta5 of the 'beta' branch, and version 3.5.0.beta6-dev of the 'tests-passed' branch. No known workarounds are available, making it crucial for users to upgrade to the patched versions (GitHub Advisory).
Additional resources
Source: This report was generated using AI
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