CVE-2021-43850

Discourse is an open source platform for community discussion. In affected versions admins users can trigger a Denial of Service attack via the `/message-bus/_diagnostics` path. The impact of this vulnerability is greater on multisite Discourse instances (where multiple forums are served from a single application server) where any admin user on any of the forums are able to visit the `/message-bus/_diagnostics` path. The problem has been patched. Please upgrade to 2.8.0.beta10 or 2.7.12. No workarounds for this issue exist.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.8 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H
GitHub_MCNA
6.8 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H
CVEADP
---
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CISA-ADPADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 60%
VendorProductVersion
discoursediscourse
𝑥
< 2.7.12
discoursediscourse
2.8.0:beta1
discoursediscourse
2.8.0:beta2
discoursediscourse
2.8.0:beta3
discoursediscourse
2.8.0:beta4
discoursediscourse
2.8.0:beta5
discoursediscourse
2.8.0:beta6
discoursediscourse
2.8.0:beta7
discoursediscourse
2.8.0:beta8
discoursediscourse
2.8.0:beta9
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39
https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr
https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39
https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr