How severe is CVE-2016-3720?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2016-3720 known to be exploited?

14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Fasterxml Jackson-Dataformat-Xml

CVE-2016-3720

XML external entity (XXE) vulnerability in XmlMapper in the Data format extension for Jackson (aka jackson-dataformat-xml) allows attackers to have unspecified impact via unknown vectors.

Published 2016-06-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.028 (85.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Fasterxml Jackson-Dataformat-Xml
Fedoraproject Fedora — versions 24

Public proof-of-concept exploits

References

lists.fedoraproject.org/pipermail/package-announce/2016-May/184561.html (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2016-3720?: CVE-2016-3720 is a critical-severity vulnerability in Fasterxml Jackson-Dataformat-Xml. CVSS score: 9.8/10. Published 2016-06-10.
How severe is CVE-2016-3720?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-3720 known to be exploited?: 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.