CVE-2025-22602

MEDIUM

Discourse - Stored Cross-Site Scripting via Video Placeholder HTML Element

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.5
EPSS 0.0015
EPSS Percentile 34.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (3)
discourse/discourse 3.4.0 beta1 (3 CPE variants)
discourse/discourse < 3.3.4
discourse/discourse < 3.4.0
Published Feb 04, 2025
Tracked Since Feb 18, 2026