CVE-2025-22602 | BDVDB-2026-265341 Detail

discoursediscourse

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact none, availability impact low. Attack vector: network.

Weaknesses#

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-694p-c5m3

Exploit#

No public exploit known

History#

Version 12025-02-04Record published in the CVE List.
Version 22025-02-12Most recent update recorded in the CVE List.

Published

Published: 2025-02-04
Last modified: 2025-02-12

Vendor information

Vendor: discourse
Product: discourse

All discourse vulnerabilities

Score

6.5 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 30.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
stable: <= 3.3.3
Fixed
Not stated
Vulnerable
beta: <= 3.4.0.beta3
Fixed
Not stated
Vulnerable
tests-passed: <= 3.4.0.beta3
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.5 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	None
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).