CVE-2026-33291 | Discourse up to 2026.1.1/2026.2.0/2026.3.0-latest Zendesk Plugin authorization (GHSA-p26h-jqr4-r6j7)

VDB-352305 · CVE-2026-33291 · GHSA-P26H-JQR4-R6J7 DISCOURSE UP TO 2026.1.1/2026.2.0/2026.3.0-LATEST ZENDESK PLUGIN AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 1.05+ Summaryinfo A vulnerability identified as critical has been detected in Discourse up to 2026.1.1/2026.2.0/2026.3.0-latest. This affects an unknown function of the component Zendesk Plugin. Performing a manipulation results in authorization. This vulnerability is known as CVE-2026-33291. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability classified as critical has been found in Discourse up to 2026.1.1/2026.2.0/2026.3.0-latest. This affects some unknown functionality of the component Zendesk Plugin. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, moderators can create Zendesk tickets for topics they do not have access to view. This affects all forums that use the Zendesk plugin. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-33291 since 03/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. Upgrading to version 2026.1.2 or 2026.2.1 eliminates this vulnerability. Productinfo Type Chat Software Name Discourse Version 2026.0 2026.1 2026.1.0 2026.1.1 2026.2.0 2026.3.0-latest License open-source Website Product: https://github.com/discourse/discourse/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authorization CWE: CWE-863 / CWE-285 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Discourse 2026.1.2/2026.2.1 Timelineinfo 03/18/2026 CVE reserved 03/21/2026 +3 days Advisory disclosed 03/21/2026 +0 days VulDB entry created 03/21/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-p26h-jqr4-r6j7 Status: Confirmed CVE: CVE-2026-33291 (🔒) GCVE (CVE): GCVE-0-2026-33291 GCVE (VulDB): GCVE-100-352305 Entryinfo Created: 03/21/2026 08:14 Changes: 03/21/2026 08:14 (67) Complete: 🔍 Cache ID: 99:1B1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸