CVE-2019-13608VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2019-13608: Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability

Affects Citrix StoreFront ServerSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
Ransomware: Used in ransomware campaigns
EPSS: 30.0% chance of exploitation in 30 days – higher than 98% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-13608 (opens in a new tab)

Description

CVE-2019-13608 is an XML External Entity (XXE) processing vulnerability in Citrix StoreFront Server. This flaw allows an unauthenticated attacker to potentially retrieve sensitive information from the affected system. The vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns. No specific affected versions or patch information is provided in the available data.

Summary

Citrix StoreFront Server contains an XML External Entity (XXE) processing vulnerability identified as CVE-2019-13608. This vulnerability enables unauthenticated attackers to exploit the XML parser to access potentially sensitive information. The issue is classified under CWE-611 (Improper Restriction of XML External Entity Reference). Exploitation has been observed in the wild, including use in ransomware campaigns. No vendor advisory or patch information is included in the provided data.

Impact

An unauthenticated attacker can exploit this vulnerability to retrieve sensitive information from the Citrix StoreFront Server. The vulnerability has been actively exploited in the wild and has been associated with ransomware campaigns, indicating a significant security risk to affected environments.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Due to the lack of explicit patch or remediation information, organizations should monitor Citrix advisories for updates and apply any official fixes once available.

Weaknesses

CWE-611XML External Entity (XXE) (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:27:28 UTC

Weaknesses

References

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