---
title: "CVE-2019-18345\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2019-18345?format=md
keywords: index, follow
---

# CVE-2019-18345

Publication date 12 December 2019

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**9.3 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2019-18345?format=md#impact-score)

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## Description

A reflected XSS issue was discovered in DAViCal through 1.1.8. It echoes
the action parameter without encoding. If a user visits an
attacker-supplied link, the attacker can view all data the attacked user
can view, as well as perform all actions in the name of the user. If the
user is an administrator, the attacker can for example add a new admin user
to gain full access to the application.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| davical | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.04 LTS bionic | Vulnerable |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.3 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Changed |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.3 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18345)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-18345)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-18345)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-18345)

### Other references

* <https://hackdefense.com/publications/cve-2019-18345-davical-caldav-server-vulnerability/>
* <https://www.cve.org/CVERecord?id=CVE-2019-18345>