High severity · published Jul 3, 2024
CVE-2024-35227
Discourse vulnerable to DoS through Onebox
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
discourse · discourse
stable < 3.2.3; tests-passed < 3.3.0.beta3 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-35227
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-35227
Patch
https://github.com/discourse/discourse/commit/10afe5fcf1ebf2e49cb80716d5e62e184c53519b
Patch
https://github.com/discourse/discourse/commit/6ce5673d2c1a511b602e1b2ade6cdc898d14ab36
Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-664f-xwjw-752c
More from discourse
9.9
CVE-2025-68662
FinalDestination hostname matching allows SSRF protection bypass
9.8
CVE-2025-53102
Discourse's WebAuthn challenge isn't cleared from user session after authentication
9.8
CVE-2025-48877
Discourse vulnerable to auto-executing of third-party code in embedded CodePen iframe
9.8
CVE-2023-47121
Discourse is an open source platform for community discussion
9.8
CVE-2021-41163
Discourse is an open source platform for community discussion