Vulnerability record

CVE-2019-13608

Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability

HighExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run StoreFront Server, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by May 3, 2022.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Fixed in	Source
StoreFront Server	Citrix (Cloud Software Group)	>= 1811, < 1903; < 3.12.4000; < 3.0.8000	1903; 3.12.4000; 3.0.8000	KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2019-13608 scored CVSS 7.5: Citrix StoreFront Server, Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched StoreFront Server systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database

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We have not published a story about this vulnerability yet.

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2019-13608
support.citrix.com https://support.citrix.com/article/CTX251988
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-13608