CVE-2026-45282

MEDIUM EPSS 21.1%
Published Jun 1, 20264w ago · Modified Jun 17, 20261w ago
6.5 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. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing password protection or download restrictions. It is applicable to any file that is shared directly, as the attacker only needs to know a documentId they own, apart of the mentioned share token. For shared folders the attacker has to know or guess a documentId of a file that is included inside the folder, making it much harder to exploit. The attacker can only extract an attachments, but not the file shared file or folder itself. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 or 27.1.11.5

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
21.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-284

Affected Products 9

VendorProductVersionRange
nextcloudnextcloud_server*≥32.0.0  –  <32.0.9
nextcloudnextcloud_server*≥33.0.0  –  <33.0.3
nextcloudnextcloud_server*≥27.0.0  –  <27.1.11.5
nextcloudnextcloud_server*≥28.0.0  –  <28.0.14.17
nextcloudnextcloud_server*≥29.0.0  –  <29.0.16.16
nextcloudnextcloud_server*≥30.0.0  –  <30.0.17.9
nextcloudnextcloud_server*≥31.0.0  –  <31.0.14.5
nextcloudnextcloud_server*≥32.0.0  –  <32.0.9
nextcloudnextcloud_server*≥33.0.0  –  <33.0.3

References 3

  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35fx-69q6-xpjr
    MitigationVendor Advisory
  • github.com https://github.com/nextcloud/text/pull/8499
    Issue TrackingPatch
  • hackerone.com https://hackerone.com/reports/3577244
    Permissions Required

Remediation

  • github.com https://github.com/nextcloud/text/pull/8499
    Issue TrackingPatch