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4.3
MEDIUM CVSS 3.1
CVE-2025-58055
Discourse AI Suggestions Contain Insecure Direct Object Reference
Description

Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to extract information about topics that they weren’t authorized to access. By modifying the “topic_id” value in API requests to the AI suggestion endpoints, users could target specific restricted topics. The AI model’s responses then disclosed information that the authenticated user couldn’t normally access. This issue is fixed in version 3.5.1. To workaround this issue, users can restrict group access to the AI helper feature through the "composer_ai_helper_allowed_groups" and "post_ai_helper_allowed_groups" site settings.

INFO

Published Date :

Oct. 1, 2025, 7:15 p.m.

Last Modified :

Oct. 23, 2025, 2:15 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-58055 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Discourse discourse
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Discourse to version 3.5.1 or later to fix AI endpoint authorization issues.
  • Update Discourse to version 3.5.1 or later.
  • Restrict group access to AI helper using site settings.
  • Configure 'composer_ai_helper_allowed_groups'.
  • Configure 'post_ai_helper_allowed_groups'.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-58055.

URL Resource
https://github.com/discourse/discourse/commit/28d569cae9b33cd55d647bf41806106e33d975c9 Patch
https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr Vendor Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-58055-detect-discourse-vulnerability
https://www.vicarius.io/vsociety/posts/cve-2025-58055-mitigate-discourse-vulnerability
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-58055 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-58055 weaknesses.

CAPEC-19: Embedding Scripts within Scripts Embedding Scripts within Scripts CAPEC-441: Malicious Logic Insertion Malicious Logic Insertion CAPEC-478: Modification of Windows Service Configuration Modification of Windows Service Configuration CAPEC-479: Malicious Root Certificate Malicious Root Certificate CAPEC-502: Intent Spoof Intent Spoof CAPEC-503: WebView Exposure WebView Exposure CAPEC-536: Data Injected During Configuration Data Injected During Configuration CAPEC-546: Incomplete Data Deletion in a Multi-Tenant Environment Incomplete Data Deletion in a Multi-Tenant Environment CAPEC-550: Install New Service Install New Service CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-552: Install Rootkit Install Rootkit CAPEC-556: Replace File Extension Handlers Replace File Extension Handlers CAPEC-558: Replace Trusted Executable Replace Trusted Executable CAPEC-562: Modify Shared File Modify Shared File CAPEC-563: Add Malicious File to Shared Webroot Add Malicious File to Shared Webroot CAPEC-564: Run Software at Logon Run Software at Logon CAPEC-578: Disable Security Software Disable Security Software

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-58055 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-58055 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 23, 2025

    Action Type Old Value New Value
    Added Reference https://www.vicarius.io/vsociety/posts/cve-2025-58055-detect-discourse-vulnerability
    Added Reference https://www.vicarius.io/vsociety/posts/cve-2025-58055-mitigate-discourse-vulnerability
  • Initial Analysis by [email protected]

    Oct. 16, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    Added CWE CWE-639
    Added CPE Configuration OR *cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:* versions up to (excluding) 3.6.0 *cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* versions up to (excluding) 3.5.1 *cpe:2.3:a:discourse:discourse:3.6.0:beta1:*:*:beta:*:*:*
    Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/commit/28d569cae9b33cd55d647bf41806106e33d975c9 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr Types: Vendor Advisory
  • New CVE Received by [email protected]

    Oct. 01, 2025

    Action Type Old Value New Value
    Added Description Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to extract information about topics that they weren’t authorized to access. By modifying the “topic_id” value in API requests to the AI suggestion endpoints, users could target specific restricted topics. The AI model’s responses then disclosed information that the authenticated user couldn’t normally access. This issue is fixed in version 3.5.1. To workaround this issue, users can restrict group access to the AI helper feature through the "composer_ai_helper_allowed_groups" and "post_ai_helper_allowed_groups" site settings.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    Added CWE CWE-284
    Added CWE CWE-639
    Added Reference https://github.com/discourse/discourse/commit/28d569cae9b33cd55d647bf41806106e33d975c9
    Added Reference https://github.com/discourse/discourse/security/advisories/GHSA-32v2-x274-vfhr
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 4.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact