What’s Vulnerable › Vulnerabilities

CVE-2018-3780

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-13 · updated 2026-06-17
• Weakness: CWE-79

Description

A missing sanitization of search results for an autocomplete field in NextCloud Server <13.0.5 could lead to a stored XSS requiring user-interaction. The missing sanitization only affected user names, hence malicious search results could only be crafted by authenticated users.

Affected products

• Nextcloud Server: before 13.0.5 — fixed in 13.0.5

How to fix

Upgrade to a fixed version: Nextcloud Server 13.0.5. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/383117
• https://nextcloud.com/security/advisory/?id=NC-SA-2018-008
• https://hackerone.com/reports/383117
• https://nextcloud.com/security/advisory/?id=NC-SA-2018-008

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