Discourse up to 3.5.0 AI Suggestion Endpoint topic_id access control

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Discourse up to 3.5.0. This vulnerability affects unknown code of the component AI Suggestion Endpoint. The manipulation of the argument topic_id results in access control. This vulnerability is known as CVE-2025-58055. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Discourse up to 3.5.0. It has been classified as critical. Affected is an unknown functionality of the component AI Suggestion Endpoint. The manipulation of the argument topic_id with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-58055 since 08/22/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 3.5.1 eliminates this vulnerability. Applying the patch 28d569cae9b33cd55d647bf41806106e33d975c9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔒

CNA Base Score: 4.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Discourse 3.5.1
Patch: 28d569cae9b33cd55d647bf41806106e33d975c9

Timelineinfo

08/22/2025 CVE reserved
10/02/2025 +41 days Advisory disclosed
10/02/2025 +0 days VulDB entry created
10/16/2025 +14 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-32v2-x274-vfhr
Status: Confirmed

CVE: CVE-2025-58055 (🔒)
GCVE (CVE): GCVE-0-2025-58055
GCVE (VulDB): GCVE-100-326670

Entryinfo

Created: 10/02/2025 08:06
Updated: 10/16/2025 19:58
Changes: 10/02/2025 08:06 (68), 10/16/2025 19:58 (9)
Complete: 🔍
Cache ID: 216::103

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