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Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, Codepen is present in the default `allowed_iframes` site setting, and it can potentially auto-run arbitrary JS in the iframe scope, which is unintended. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. As a workaround, the Codepen prefix can be removed from a site's `allowed_iframes`.
Metrics
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OR
*cpe:2.3:a:discourse:discourse:3.5.0:beta1:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta2:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:* versions up to (excluding) 3.5.0
*cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* versions up to (excluding) 3.4.4
*cpe:2.3:a:discourse:discourse:3.5.0:-:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta3:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta4:*:*:beta:*:*:*
OR
*cpe:2.3:a:discourse:discourse:3.5.0:beta1:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta2:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:* versions up to (excluding) 3.5.0
*cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* versions up to (excluding) 3.4.4
*cpe:2.3:a:discourse:discourse:3.5.0:beta3:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta4:*:*:beta:*:*:*
Initial Analysis by NIST8/25/2025 11:14:34 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CPE Configuration
OR
*cpe:2.3:a:discourse:discourse:3.5.0:beta1:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta2:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:* versions up to (excluding) 3.5.0
*cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* versions up to (excluding) 3.4.4
*cpe:2.3:a:discourse:discourse:3.5.0:-:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta3:*:*:beta:*:*:*
*cpe:2.3:a:discourse:discourse:3.5.0:beta4:*:*:beta:*:*:*
New CVE Received from GitHub, Inc.6/09/2025 9:15:23 AM
Action
Type
Old Value
New Value
Added
Description
Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, Codepen is present in the default `allowed_iframes` site setting, and it can potentially auto-run arbitrary JS in the iframe scope, which is unintended. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. As a workaround, the Codepen prefix can be removed from a site's `allowed_iframes`.