CVE Vulnerability

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.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.8 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.3 / Impact : 4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39 Patch Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta9:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta8:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*
Information

Published : 2022-01-04 08:15

Updated : 2022-01-14 02:50

NVD link : CVE-2021-43850

Mitre link : CVE-2021-43850

Products Affected
No products.
CWE
NVD-CWE-noinfo