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CVE-2024-35234— Discourse vulnerable to stored-dom XSS via Facebook Oneboxes

Quick assessment

Affected
discourse discourse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Discourse是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存在安全漏洞，该漏洞源于存在存储型跨站脚本，攻击者可以通过特定URL在用户的浏览器上执行任意JavaScript。

CVSS 4.2 · Medium EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2024-35234

Vulnerability Information
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Vulnerability Title
Discourse vulnerable to stored-dom XSS via Facebook Oneboxes
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, an attacker can execute arbitrary JavaScript on users’ browsers by posting a specific URL containing maliciously crafted meta tags. This issue only affects sites with Content Security Polic (CSP) disabled. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. As a workaround, ensure CSP is enabled on the forum.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
Vulnerability Title
Discourse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是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存在安全漏洞，该漏洞源于存在存储型跨站脚本，攻击者可以通过特定URL在用户的浏览器上执行任意JavaScript。
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

Vendor Product Affected Versions CPE Subscribe
discourse discourse stable < 3.2.3 -

II. Public POCs for CVE-2024-35234

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III. Intelligence Information for CVE-2024-35234

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Patches & Fixes for CVE-2024-35234 (2)

Vendor Advisories for CVE-2024-35234 (1)

Same Patch Batch · discourse · 2024-07-03 · 5 CVEs total

CVE-2024-35227 7.5 HIGH Discourse vulnerable to DoS through Onebox
CVE-2024-37157 6.4 MEDIUM Discourse vulnerable to Server-Side Request Forgery via FastImage
CVE-2024-36113 4.9 MEDIUM Discourse missing authorization checks for suspending admins/moderators
CVE-2024-36122 2.4 LOW Discourse doesn't limit reviewable user serializer payload

IV. Related Vulnerabilities

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

V. Comments for CVE-2024-35234

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