CVE-2023-22468CWE-79

Discourse vulnerable to Cross-site Scripting in local oneboxes

High · published January 26, 2023

CVSS v3.1
8.8
EPSS
1%
Percentile
42.2
In the wild
Unconfirmed
What it is

Discourse is an open source platform for community discussion. Versions prior to 2.8.13 (stable), 3.0.0.beta16 (beta) and 3.0.0beta16 (tests-passed), are vulnerable to cross-site Scripting. A maliciously crafted URL can be included in a post to carry out cross-site scripting attacks on sites with disabled or overly permissive CSP (Content Security Policy). Discourse's default CSP prevents this vulnerability. This vulnerability is patched in versions 2.8.13 (stable), 3.0.0.beta16 (beta) and 3.0.0beta16 (tests-passed). As a workaround, enable and/or restore your site's CSP to the default one provided with Discourse.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00504 · 42.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2023-01-26T08:31Z
EPSS history
Timeline
  • 26 JAN 08:31Z
    Discourse vulnerable to Cross-site Scripting in local oneboxes
    cvelistv5