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Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 3 May 2022. Known ransomware use
Storefront ServerApplication · Citrix

CVE-2019-13608

HIGH · 7.5 CVSS v3.1 Published 2019-08-29
Fix available
A fix is available. Upgrade to 3.0.8000 / 3.12.4000 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild Ransomware Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Citrix StoreFront Server before 1903, 7.15 LTSR before CU4 (3.12.4000), and 7.6 LTSR before CU8 (3.0.8000) allows XXE attacks.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Citrix StoreFront Server contains an XML External Entity (XXE) vulnerability in versions before 1903, 7.15 LTSR CU4, and 7.6 LTSR CU8. The vulnerability allows attackers to inject malicious XML entities into requests processed by the StoreFront Server, potentially enabling disclosure of internal files, denial of service, or server-side request forgery.

MitigationUpgrade Citrix StoreFront Server to version 1903, 7.15 LTSR CU4 (3.12.4000), or 7.6 LTSR CU8 (3.0.8000) or later. If immediate patching is not possible, disable XML entity resolution in the XML parser configuration.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Storefront ServerApplication
Affected:>= 1811, < 1903< 3.12.4000< 3.0.8000

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Citrix StoreFront Server version
    Open the StoreFront Management Console and navigate to the About section, or use the Get-STFRole cmdlet via PowerShell to retrieve the installed version number
    Affected if The version falls within these ranges: 1811 through any version before 1903, or any version before 3.12.4000 (which maps to 7.15 LTSR CU4), or any version before 3.0.8000 (which maps to 7.6 LTSR CU8)
  2. Confirm StoreFront services are running
    Check that the Citrix StoreFront Service (Citrix StoreFront) or the StoreFront Service Host is running on the server via Services.msc or PowerShell
    Affected if The service is running and the version is in the affected ranges from step 1
  3. Identify if XML-based endpoints are exposed
    Review the StoreFront website bindings and virtual directories in IIS Manager. Look for paths such as /Citrix/Store or /PowerShellRemoting that accept XML-formatted requests
    Affected if XML-handling endpoints are accessible and the StoreFront version is vulnerable
  4. Review XML parser configuration
    Examine the web.config files in the StoreFront installation directory (typically under C:\inetpub\wwwroot\Citrix\StoreFront) for custom XML parser settings that may control external entity resolution
    Affected if XML parser is configured to allow external entity resolution and the version is in the affected range

You are affected if the installed Citrix StoreFront Server version is 1811 or later but earlier than 1903, or earlier than 3.12.4000, or earlier than 3.0.8000, and the server processes XML requests.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.0.8000 / 3.12.4000 / 1903 or later
Fixed in 3.0.80003.12.40001903
Interim mitigation

Upgrade Citrix StoreFront Server to version 1903, 7.15 LTSR CU4 (3.12.4000), or 7.6 LTSR CU8 (3.0.8000) or later. If immediate patching is not possible, disable XML entity resolution in the XML parser configuration.

Recommended fix High confidence

1903 (current release) or 3.12.4000 (7.15 LTSR CU4) or 3.0.8000 (7.6 LTSR CU8)

  1. 1. Identify the current Citrix StoreFront Server version by checking Add/Remove Programs or the StoreFront management console
  2. 2. Determine which release branch you are on: current release (1808-1902), 7.15 LTSR, or 7.6 LTSR
  3. 3. For StoreFront versions 1811 through 1902: Download and install StoreFront 1903 or later from support.citrix.com
  4. 4. For StoreFront 7.15 LTSR (versions before 3.12.4000): Download and install Cumulative Update 4 (3.12.4000) or later from support.citrix.com
  5. 5. For StoreFront 7.6 LTSR (versions before 3.0.8000): Download and install Cumulative Update 8 (3.0.8000) or later from support.citrix.com
  6. 6. Apply the upgrade following Citrix StoreFront upgrade documentation (backup configuration, run installer, verify services)
  7. 7. Verify the upgrade was successful by checking the StoreFront version and confirming XML parsing functionality works correctly
Caveat Standard LTSR upgrade procedures apply; review Citrix documentation for specific migration steps between major versions

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Storefront Server Exploited in the wild — priority engagement
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-13608 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data