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CVE-2023-28848— CSRF protection on user_oidc login returned the expected token in case of an error

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 user_oidc是德国Nextcloud公司的一个应用程序 user_oidc 1.0.0版本至1.3.0版本存在跨站请求伪造漏洞，该漏洞源于应用程序将预期的状态令牌从第一个请求复制到第二个请求。

CVSS 4.8 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services
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I. Basic Information for CVE-2023-28848

Vulnerability Information
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Vulnerability Title
CSRF protection on user_oidc login returned the expected token in case of an error
Source: CVE Program / CVE List V5
Vulnerability Description
user_oidc is the OIDC connect user backend for Nextcloud, an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
user_oidc 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud user_oidc是德国Nextcloud公司的一个应用程序 user_oidc 1.0.0版本至1.3.0版本存在跨站请求伪造漏洞，该漏洞源于应用程序将预期的状态令牌从第一个请求复制到第二个请求。
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 >= 1.0.0, < 1.3.0 -

II. Public POCs for CVE-2023-28848

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III. Intelligence Information for CVE-2023-28848

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Patches & Fixes for CVE-2023-28848 (1)

Vendor Advisories for CVE-2023-28848 (1)

Other References for CVE-2023-28848 (1)

Same Patch Batch · nextcloud · 2023-04-04 · 5 CVEs total

CVE-2023-28999 6.9 MEDIUM Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access
CVE-2023-28998 6.7 MEDIUM Nextcloud Desktop client misbehaves with E2EE when the server returns empty list of metada
CVE-2023-28997 6.7 MEDIUM Nextcloud Desktop: Initialization vector reuse in E2EE allows malicious server admin to br
CVE-2023-29000 5.4 MEDIUM Nextcloud Desktop client does not verify received singed certificate in end-to-end encrypt

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-352

V. Comments for CVE-2023-28848

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