CVE-2023-43658CWE-79

Improper escaping of user input in discourse-calendar

High · published October 16, 2023

CVSS v3.1
8.0
EPSS
1%
Percentile
47.5
In the wild
Unconfirmed
What it is

dicourse-calendar is a plugin for the Discourse messaging platform which adds the ability to create a dynamic calendar in the first post of a topic. Improper escaping of event titles could lead to Cross-site Scripting (XSS) within the 'email preview' UI when a site has CSP disabled. Having CSP disabled is a non-default configuration, so the vast majority of sites are unaffected. This problem is resolved in the latest version of the discourse-calendar plugin. Users are advised to upgrade. Users unable to upgrade should ensure CSP is enabled on the forum.

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00591 · 47.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2023-10-16T21:28Z
EPSS history
Timeline
  • 16 OCT 21:28Z
    Improper escaping of user input in discourse-calendar
    cvelistv5