How to fix CVE-2025-22602?

Within 30 days: Identify affected systems running affected and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Discourse affected by CVE-2025-22602?

Organizations using affected should be aware of notable risk from CVE-2025-22602, a cross-site scripting vulnerability rated CVSS 6.5. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

CVE-2025-22602

MEDIUM

2025-02-04 [email protected]

6.5

CVSS 3.1

CVSS Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:24 vuln.today

CVE Published

Feb 04, 2025 - 21:15 nvd

MEDIUM 6.5

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.

Analysis

Discourse is an open source platform for community discussion. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Discourse.

Affected Products

Discourse.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +32

POC: 0

CVE-2025-22602 vulnerability details – vuln.today

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CVE-2025-22602

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CVE-2025-22602

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Lifecycle Timeline

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Description

Analysis

Technical Context

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