What is CVE-2021-44147?

CVE-2021-44147 is a medium-severity vulnerability in Claris Filemaker Pro, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.5/10. Published 2021-11-22.

How severe is CVE-2021-44147?

Medium severity. CVSS v3 base score is 5.5 out of 10.

XXE in Claris Filemaker Pro

CVE-2021-44147

An XML External Entity issue in Claris FileMaker Pro and Server (including WebDirect) before 19.4.1 allows a remote attacker to disclose local files via a crafted XML/Excel document and perform server-side request forgery attacks.

Vulnerability class: XXE (XML External Entity)

Published 2021-11-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

davidhamann.de/2021/11/18/filemaker-xxe-vulnerability/ (Exploit, Third Party Advisory)
support.claris.com/s/answerview (Vendor Advisory)

Frequently asked questions

What is CVE-2021-44147?: CVE-2021-44147 is a medium-severity vulnerability in Claris Filemaker Pro, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.5/10. Published 2021-11-22.
How severe is CVE-2021-44147?: Medium severity. CVSS v3 base score is 5.5 out of 10.