CVE-2023-6927
keycloak-core: open redirect via "form_post.jwt" JARM response mode
4.6
MEDIUM
CVSS 3.1
EPSS 0.84%
Description
An incomplete fix was found in Keycloak Core patch. An attacker can steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt". It is observed that changing the response_mode parameter in the original proof of concept from "form_post" to "form_post.jwt" can bypass the security patch implemented to address CVE-2023-6134.
How to fix CVE-2023-6927
To remediate CVE-2023-6927, upgrade the affected package to a fixed version below.
- —upgrade to 23.0.4 or later
Is CVE-2023-6927 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 23.0.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |