What’s Vulnerable › Vulnerabilities

CVE-2017-0883

• Severity: medium (CVSS 6.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-05 · updated 2026-06-17
• Weakness: CWE-275

Description

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.

Affected products

• Nextcloud Server: through 9.0.54; 10.0.2

References

• https://hackerone.com/reports/169680
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-001
• https://hackerone.com/reports/169680
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-001

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