CVE-2018-3763

Name: CVE-2018-3763
Creator: NVD / NIST
Published: 2018-07-05T16:29:00.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2018-3763 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.61%

44.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Calendar	< 1.5.8
Nextcloud	Calendar	1.6.0

References

https://nextcloud.com/security/advisory/?id=nc-sa-2018-004Broken Link, Vendor Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2018-004Broken Link, Vendor Advisory

Timeline

Published: Jul 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3763?

How severe is CVE-2018-3763?

CVE-2018-3763 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3763?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-3763?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST