CVE-2026-45278

MEDIUM EPSS 13.9%
Published Jun 1, 20264w ago · Modified Jun 17, 20261w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Jun 1, 2026 4w ago
Last Modified Jun 17, 2026 1w ago

Description

Nextcloud is an open source content collaboration platform. From version 6.1.0 to before version 8.2.2, an attacker can craft links that would redirect users to another website, when the victim uses the attackers link to log in via user OIDC. This issue has been patched in version 8.2.2.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
13.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-601

Affected Products 1

VendorProductVersionRange
nextclouduser_oidc*≥6.1.0  –  <8.2.2

References 3

  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8wjr-5cg8-4w73
    Vendor Advisory
  • github.com https://github.com/nextcloud/user_oidc/pull/1273
    Issue TrackingPatch
  • hackerone.com https://hackerone.com/reports/3464925
    Permissions Required

Remediation

  • github.com https://github.com/nextcloud/user_oidc/pull/1273
    Issue TrackingPatch