CVE-2023-28848 - CVE House
Back to Database
Status published Medium CVE-2023-28848

CSRF protection on user_oidc login returned the expected token in case of an error

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-28848

Credits & Attribution

No credits recorded in the NVD database.

References

More from nextcloud

View All →
CVE-2025-66558
Nextcloud Twofactor WebAuthn app was updated based on public key
Low 3.1
CVE-2025-66557
Nextcloud Deck app allowed user with "Can share" permission to modify permissions of other non-owners
Medium 5.4
CVE-2025-66556
Nextcloud talk allows participants to blindly delete poll drafts of other users by ID
Low 3.5
CVE-2025-66554
Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field
Low 3.5
CVE-2025-66553
Nextcloud Tables app allowed users to view columns metadata information of any table
Medium 4.3

Affected Vendor

Affected Software

security-advisories
Vulnerable Versions:
>= 1.0.0, < 1.3.0

Timeline

Official Publish: April 4th, 2023
Last Modified: February 11th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-352

MITRE ATT&CK TTPs

T1566.002 Spearphishing Link
Initial Access
T1204.001 Malicious Link
Execution
T1098 Account Manipulation
Persistence
T1565.001 Stored Data Manipulation
Impact