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CVE-2024-22400— Open redirect in user_saml via RelayState parameter in Nextcloud User Saml

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 User Saml存在输入验证错误漏洞，该漏洞源于允许攻击者通过RelayState参数在user_saml中打开重定向。受影响的产品和版本：Nextcloud User Saml 5.0.0及更高版本，5.1.0及更高版本，5.2.0及更高版本，6.0.0及更高版本。

CVSS 3.1 · Low EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2024-22400

Vulnerability Information
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Vulnerability Title
Open redirect in user_saml via RelayState parameter in Nextcloud User Saml
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud User Saml is an app for authenticating Nextcloud users using SAML. In affected versions users can be given a link to the Nextcloud server and end up on a uncontrolled thirdparty server. It is recommended that the User Saml app is upgraded to version 5.1.5, 5.2.5, or 6.0.1. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 输入验证错误漏洞
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 User Saml存在输入验证错误漏洞，该漏洞源于允许攻击者通过RelayState参数在user_saml中打开重定向。受影响的产品和版本：Nextcloud User Saml 5.0.0及更高版本，5.1.0及更高版本，5.2.0及更高版本，6.0.0及更高版本。
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
nextcloud security-advisories >= 5.0.0, < 5.1.5 -

II. Public POCs for CVE-2024-22400

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III. Intelligence Information for CVE-2024-22400

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Patches & Fixes for CVE-2024-22400 (2)

Vendor Advisories for CVE-2024-22400 (1)

Other References for CVE-2024-22400 (1)

Same Patch Batch · nextcloud · 2024-01-18 · 7 CVEs total

CVE-2024-22212 9.7 CRITICAL Nextcloud global site selector authentication bypass
CVE-2024-22402 5.4 MEDIUM Improper handling of request URLs in Nextcloud Guests app allows guest users to bypass app
CVE-2024-22401 4.1 MEDIUM All users can reset the allowed apps list for Nextcloud Guest App users
CVE-2024-22404 4.1 MEDIUM Permissions bypass in Nextcloud with the files zip app
CVE-2024-22403 3.0 LOW OAuth2 authorization codes are valid indefinetly in Nextcloud server
CVE-2024-22213 Cross-site Scripting when sending HTML as a comment in the Nextcloud Deck app

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-601

V. Comments for CVE-2024-22400

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