Vulnerability identifier: #VU25396

Vulnerability risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1697

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 due to insufficient sanitization of user-supplied data in client settings. A remote authenticated attacker can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website via Application Links.

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 update from vendor's website.

Vulnerable software versions

Keycloak: 0.6.0, 1.0 - 1.9.8, 2.0.0 - 2.5.10, 3.0.0 - 3.4.3, 4.0.0 - 4.8.3, 5.0.0, 6.0.0 - 6.0.1, 7.0.0 - 7.0.1, 8.0.0 - 8.0.1

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1697
http://github.com/keycloak/keycloak/commit/75457496325c4ae8963199a318d834d6a5eaad16#diff-a8224fb55ff896c3ddd2fcdaac260177
http://snyk.io/vuln/SNYK-JAVA-ORGKEYCLOAK-548450

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.