Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2025-48877

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`.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 21.2%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2025-48877


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