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CVE-2023-33183— Error in calendar when booking an appointment reveals the full path of the website

Quick assessment

Affected
nextcloud security-advisories
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.

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Calendar v4.2.2及之前版本、v3.5.4及之前版本存在安全漏洞，该漏洞源于当 SMTP 服务器不可用时，网站的某些内部路径会被泄露。

CVSS 2.6 · Low EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1592 · Gather Victim Host Information
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I. Basic Information for CVE-2023-33183

Vulnerability Information
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Vulnerability Title
Error in calendar when booking an appointment reveals the full path of the website
Source: CVE Program / CVE List V5
Vulnerability Description
Calendar app for Nextcloud easily sync events from various devices with your Nextcloud. Some internal paths of the website are disclosed when the SMTP server is unavailable. It is recommended that the Calendar app is updated to 3.5.5 or 4.2.3
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud Calendar 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Calendar v4.2.2及之前版本、v3.5.4及之前版本存在安全漏洞，该漏洞源于当 SMTP 服务器不可用时，网站的某些内部路径会被泄露。
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
nextcloud security-advisories < 3.5.5 -

II. Public POCs for CVE-2023-33183

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III. Intelligence Information for CVE-2023-33183

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Patches & Fixes for CVE-2023-33183 (1)

Vendor Advisories for CVE-2023-33183 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-285

V. Comments for CVE-2023-33183

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