Vulnerability identifier: #VU77750
Vulnerability risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Keycloak
Server applications /
Directory software, identity management
Vendor: Keycloak
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists in the SAML or OIDC providers in Keycloak due to insufficient sanitization of user-supplied data passed via the AssertionConsumerServiceURL value or the redirect_uri. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Keycloak: 10.0.0 - 21.1.1
External links
http://access.redhat.com/errata/RHSA-2023:3892
http://github.com/keycloak/keycloak/security/advisories/GHSA-3p62-6fjh-3p5h
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.