Use of Web Browser Cache Containing Sensitive Information in Discourse - CVE-2025-61598
Published: July 1, 2026
Vulnerability identifier: #VU136112
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-61598
CWE-ID: CWE-525
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Civilized Discourse Construction Kit, Inc.
Affected software:
Discourse
Discourse
Detailed vulnerability description
The vulnerability allows a remote attacker to conduct cache poisoning attacks.
The vulnerability exists due to improper cache control in error responses when handling error responses. A remote attacker can trigger error responses to conduct cache poisoning attacks.
Proxies may unintentionally cache the affected responses.
How to mitigate CVE-2025-61598
Install security update from vendor's website.