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CVE-2023-28440— Denial of service via admin theme import route in Discourse

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存在资源管理错误漏洞，该漏洞源于来自 Discourse 管理员的恶意请求可能会导致请求长时间运行并最终超时。受影响的产品和版本：Discourse stable <= 3.0.2及之前版本，beta 3.1.0.beta3及之前版本，tests-passed 3.1.0.beta3及之前版本。

CVSS 2.7 · Low EPSS 0.69% · P51

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-28440

Vulnerability Information
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Vulnerability Title
Denial of service via admin theme import route in Discourse
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untrusted. This issue has been addressed in versions 3.0.3 and 3.1.0.beta4. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于来自 Discourse 管理员的恶意请求可能会导致请求长时间运行并最终超时。受影响的产品和版本：Discourse stable <= 3.0.2及之前版本，beta 3.1.0.beta3及之前版本，tests-passed 3.1.0.beta3及之前版本。
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: <= 3.0.2 -

II. Public POCs for CVE-2023-28440

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III. Intelligence Information for CVE-2023-28440

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Vendor Advisories for CVE-2023-28440 (1)

Same Patch Batch · discourse · 2023-04-18 · 4 CVEs total

CVE-2023-30538 5.4 MEDIUM Stored Cross-site Scripting via improper sanitization of svg files in Discourse
CVE-2023-30606 4.2 MEDIUM Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discour
CVE-2023-29196 4.2 MEDIUM HTML injection via topic embedding in Discourse

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-400

V. Comments for CVE-2023-28440

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