UpHeron
All vulnerabilities

Servers and applications

CVE-2021-43794

Discourse is an open source discussion platform. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown a JSON blob instead of the HTML page. This can lead to a partial denial-of-service. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.

Severity
Medium 5.3
Published
1 Dec 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
2.7.11
Sources
NVD

Affected software

SoftwareAffected versions
DiscourseServers and applications · cpe:a:discourse:discourse
  • Every version before 2.7.11

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-43794
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-43794