CVE-2023-32061: Discourse Topic Creation Page Allows iFrame Tag without Restrictions

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-13 · updated 2026-06-17
Weakness: CWE-863

Description

Discourse is an open source discussion platform. Prior to version 3.0.4 of the `stable` branch and version 3.1.0.beta5 of the `beta` and `tests-passed` branches, the lack of restrictions on the iFrame tag makes it easy for an attacker to exploit the vulnerability and hide subsequent comments from other users. This issue is patched in version 3.0.4 of the `stable` branch and version 3.1.0.beta5 of the `beta` and `tests-passed` branches. There are no known workarounds.

Affected products

discourse: before 3.0.4; 3.1.0-beta1, 3.1.0-beta2, 3.1.0-beta3, 3.1.0-beta4 — fixed in 3.0.4

How to fix

Upgrade to a fixed version: discourse 3.0.4. Check the vendor advisory for mitigations.

References

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