---
id: "CVE-2019-13608"
kind: "vulnerability"
aliases: ["CVE-2019-13608"]
title: "Citrix StoreFront Server: Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability"
severity: "high"
cvss: 7.5
epss: 0.30041
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Citrix StoreFront Server", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["citrix", "exploited", "on-prem", "ransomware", "storefront", "vendor"]
not_affected_if: ["managed-hosting"]
published_at: "2019-08-29T19:15:13+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-13608", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2019-13608", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13608", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Citrix StoreFront Server: Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability

Citrix StoreFront Server parses XML in a way that lets an unauthenticated attacker make it load external entities. An attacker can use this to read potentially sensitive files or data from the server.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Citrix StoreFront Server affected ? fixed ?

## Fix

Apply the Citrix update per vendor instructions; the sources do not name the fixed build.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-13608
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2019-13608
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2019-13608

## From the sources

Citrix StoreFront Server contains an XML External Entity (XXE) processing vulnerability that may allow an unauthenticated attacker to retrieve potentially sensitive information.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_