Description
Discourse is an open source discussion platform. In versions prior to 2.8.9 on the `stable` branch and prior to 2.9.0.beta10 on the `beta` and `tests-passed` branches, admins can upload a maliciously crafted Zip or Gzip Tar archive to write files at arbitrary locations and trigger remote code execution. The problem is patched in version 2.8.9 on the `stable` branch and version 2.9.0.beta10 on the `beta` and `tests-passed` branches. There are no known workarounds.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-grvh-qcpg-hfmv
Patch, Third Party Advisory x_refsource_misc
https://github.com/discourse/discourse/pull/18421
Patch, Third Party Advisory x_refsource_misc
https://github.com/discourse/discourse/commit/b27d5626d208a22c516a0adfda7554b67b493835
Scores
CVSS v3
9.1
EPSS
0.0327
EPSS Percentile
87.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-434
Status
published
Products (2)
discourse/discourse
2.9.0 beta1 (9 CPE variants)
discourse/discourse
< 2.8.9
Published
Sep 29, 2022
Tracked Since
Feb 18, 2026