CVE-2020-1697Network attack vector

Stored XSS via unvalidated Application Links

Published Feb 10, 2020 · Updated Aug 4, 2024

Stored XSS in Red Hat build of Keycloak before 9.0.0 allows remote authenticated users to run script through Application Links. The Admin Console accepts an external-application URL without proper validation and later renders it as an Application Link for other users. An attacker must create the crafted URL and persuade a user in another realm to follow it, exposing that user’s browser session to script execution.

CVSS severity6.1
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Red Hat build of Keycloak before 9.0.0 allows remote authenticated users to run script through Application Links. The Admin Console accepts an external-application URL without proper validation and later renders it as an Application Link for other users. An attacker must create the crafted URL and persuade a user in another realm to follow it, exposing that user’s browser session to script execution.

The record

CVE
CVE-2020-1697
Published
Feb 10, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions before 9.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat build of Keycloakversion=All versions before 9.0.0

Published CVSS scores

6.1Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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