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Fencer Intel
medium 6.1

CVE-2020-1697 json

XSS in Keycloak

published 6y ago modified 4mo ago also GHSA-8vf3-4w62-m3pq , EUVD-2020-0373

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

It was found in all keycloak versions before 9.0.0 that links to external applications (Application Links) in the admin console are not validated properly and could allow Stored XSS attacks. An authed malicious user could create URLs to trick users in other realms, and possibly conduct further attacks.

Patch / fix

  • maven org.keycloak:keycloak-core 9.0.0
  • redhat keycloak 9.0.0

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-1697 updated cvss 6.1

keycloak: stored XSS in client settings via application links

  • Red Hat Mobile Application Platform 4 keycloak
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes keycloak keycloak Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak Red Hat support for Spring Boot keycloak keycloak
    affected: no fix available
  • Red Hat Runtimes Spring Boot 2.2.6
    fixed: vendor fix RHSA-2020:2252
  • Red Hat Single Sign-On 7.3
    fixed: vendor fix RHSA-2020:0445
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:2905
  • Red Hat Fuse 7 keycloak keycloak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<9.0.0
9.0.0

Affected products

  • Red Hat keycloak

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.