Actively exploited · Published Aug 29, 2019 · Assigned by mitre

CVE-2019-13608

High 7.5 Exploited Ransomware

In plain English

A high-severity XML external entity in StoreFront Server from Citrix. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 30.0% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Apply updates per vendor instructions.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)30.0%top 1.8% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack tooling1Nuclei

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-611 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://support.citrix.com/article/CTX251988 x_refsource_CONFIRM
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-13608 government-resource