CVE-2025-22602CWE-79

Stored DOM-based XSS (without CSP) via video placeholders in Discourse

Medium · published February 4, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
28.9
In the wild
Unconfirmed
What it is

Discourse is an open source platform for community discussion. In affected versions an attacker can execute arbitrary JavaScript on users' browsers by posting a malicious video placeholder html element. This issue only affects sites with CSP disabled. This problem has been patched in the latest version of Discourse. Users are advised to upgrade. Users unable to upgrade should enable CSP.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00362 · 28.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-02-04T20:51Z
EPSS history
Timeline
  • 04 FEB 20:51Z
    Stored DOM-based XSS (without CSP) via video placeholders in Discourse
    cvelistv5