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CVE-2026-32243— Discourse: Stored XSS in discourse-ai shared conversations onebox

EPSS 0.03% · P10
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I. Basic Information for CVE-2026-32243

Vulnerability Information
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Vulnerability Title
Discourse: Stored XSS in discourse-ai shared conversations onebox
Source: NVD (National Vulnerability Database)
Vulnerability Description
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an attacker with the ability to create shared AI conversations could inject arbitrary HTML and JavaScript via crafted conversation titles. This payload would execute in the browser of any user viewing the onebox preview, potentially allowing session hijacking or unauthorized actions on behalf of the victim. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Discourse 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是Discourse开源的一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 2026.1.3之前版本、2026.2.2之前版本和2026.3.0之前版本存在跨站脚本漏洞，该漏洞源于能够创建共享AI对话的攻击者可通过特制对话标题注入任意HTML和JavaScript，可能导致会话劫持或未授权操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
discoursediscourse >= 2026.1.0-latest, < 2026.1.3 -

II. Public POCs for CVE-2026-32243

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III. Intelligence Information for CVE-2026-32243

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Same Patch Batch · discourse · 2026-03-31 · 15 CVEs total

CVE-2026-322735.4 MEDIUMDiscourse: XSS on category description update via API
CVE-2026-326184.3 MEDIUMDiscourse: Unauthorized channel membership inference via excluded_memberships_channel_id
CVE-2026-329514.3 MEDIUMDiscourse: Authorization bypass in oneboxer via user-controlled category id
CVE-2026-32113Discourse: Open redirect via `sso_destination_url` cookie in `enter`
CVE-2026-32607Discourse: Stored XSS via unescaped assignee name
CVE-2026-32620Discourse: Missing post-level authorization allows whisper metadata disclosure
CVE-2026-32619Discourse: Insufficient topic visibility check allows unauthorized poll manipulation in pr
CVE-2026-32615Discourse: Category group moderators can perform actions on topics in restricted categorie
CVE-2026-32143Discourse: Admin-only report can be exported by moderators
CVE-2026-33074Discourse: Vulnerability in discourse-subscriptions plugin allowing users to self-grant to
CVE-2026-33073discourse-subscriptions plugin leaking stripe API key in multisite environment
CVE-2026-33415Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Ex
CVE-2026-33300Discourse: Hidden group names and access metadata are exposed to moderators through the `c
CVE-2026-33185Discourse: Group SMTP test endpoint susceptible to SSRF

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-79

V. Comments for CVE-2026-32243

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