SQL injection in Discourse - CVE-2021-32784
Published: July 23, 2021 / Updated: July 1, 2026
Vulnerability identifier: #VU136572
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-32784
CWE-ID: CWE-89
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to SQL injection in top topics RSS feed route when handling top route parameters. A remote attacker can send a specially crafted request to disclose sensitive information.
Affected software
Discourse
How to mitigate CVE-2021-32784
Install security update from vendor's website.
Discourse - update to 2.8.0 beta4