What’s Vulnerable › Vulnerabilities

CVE-2017-0894

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-05-08 · updated 2026-06-17
• Weakness: CWE-285

Description

Nextcloud Server before 11.0.3 is vulnerable to disclosure of valid share tokens for public calendars due to a logical error. Thus granting an attacker potentially access to publicly shared calendars without knowing the share token.

Affected products

• Nextcloud Server: before 11.0.3 — fixed in 11.0.3

How to fix

Upgrade to a fixed version: Nextcloud Server 11.0.3. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/218876
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-011
• https://hackerone.com/reports/218876
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-011

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