What’s Vulnerable › Vulnerabilities

CVE-2022-46159: Any authenticated Discourse user can create an unlisted topic

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-02 · updated 2026-06-17
• Weakness: CWE-770

Description

Discourse is an open-source discussion platform. In version 2.8.13 and prior on the `stable` branch and version 2.9.0.beta14 and prior on the `beta` and `tests-passed` branches, any authenticated user can create an unlisted topic. These topics, which are not readily available to other users, can take up unnecessary site resources. A patch for this issue is available in the `main` branch of Discourse. There are no known workarounds available.

Affected products

• discourse: through 2.8.13; 2.9.0-beta1, 2.9.0-beta10, 2.9.0-beta11, 2.9.0-beta12, 2.9.0-beta13, 2.9.0-beta14 (+7)

References

• https://github.com/discourse/discourse/commit/0ce38bd7bce862db251b882613ab7053ca777382
• https://github.com/discourse/discourse/security/advisories/GHSA-qf99-xpx6-hgxp
• https://github.com/discourse/discourse/commit/0ce38bd7bce862db251b882613ab7053ca777382
• https://github.com/discourse/discourse/security/advisories/GHSA-qf99-xpx6-hgxp

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