# Keycloak error_description injection on error pages that can trigger phishing attacks Advisory record · `GHSA-27gc-wj6x-9w55` - **Identifiers:** `GHSA-27gc-wj6x-9w55` · `CVE-2025-10044` - **State:** Confirmed - **Severity:** CVSS 4.3 Medium - **Critical:** No - **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html) - **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) - **Published:** 17 Oct 2025 - **Updated:** 17 Oct 2025 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 17 Oct 2025, 17:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `org.keycloak:keycloak-account-ui` (Maven): affected `<26.2.9 || >=26.3.0, <26.3.4`; fixed in `26.2.9`, `26.3.4` - `org.keycloak:keycloak-admin-ui` (Maven): affected `<26.2.9 || >=26.3.0, <26.3.4`; fixed in `26.2.9`, `26.3.4` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Keycloak's account console and admin console (org.keycloak:keycloak-account-ui and org.keycloak:keycloak-admin-ui) are affected in versions before 26.2.9 and from 26.3.0 before 26.3.4. The error_description query parameter is shown on error pages without validation, so an attacker can craft a link that displays misleading text, such as a fake support number or URL, inside the trusted Keycloak interface. Upgrade to 26.2.9 or 26.3.4. The source gives few details on any workaround. Written 7 Nov 2026. ## Not analysed yet We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check. ## Severity and exploitation - 4.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`, from CNA (redhat) - **CISA KEV:** Not listed. - **EPSS:** 0.0032, the 25th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 8 Oct 2025, 14:06 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/keycloak/keycloak/security/advisories/GHSA-27gc-wj6x-9w55) - 31 Oct 2026, 15:10 UTC: First seen by agentprime - 31 Oct 2026, 15:10 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-27gc-wj6x-9w55) ## Sources - [GitHub Advisory Database: GHSA-27gc-wj6x-9w55](https://github.com/advisories/GHSA-27gc-wj6x-9w55) - [OSV: GHSA-27gc-wj6x-9w55](https://osv.dev/vulnerability/GHSA-27gc-wj6x-9w55) - - - - - - - - Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code. ## Check whether this affects you A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet. - With the agentprime MCP server (), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .