What is CVE-2016-3709?

CVE-2016-3709 is a medium-severity vulnerability in Xmlsoft Libxml2, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-07-28.

How severe is CVE-2016-3709?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2016-3709 known to be exploited?

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

XSS in Xmlsoft Libxml2

CVE-2016-3709

Possible cross-site scripting vulnerability in libxml after commit 960f0e2.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-07-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (59.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.001

Affected products

Xmlsoft Libxml2
Libxml2 — versions 2.9.x

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

mail.gnome.org/archives/xml/2018-January/msg00010.html (Exploit, Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2016-3709?: CVE-2016-3709 is a medium-severity vulnerability in Xmlsoft Libxml2, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-07-28.
How severe is CVE-2016-3709?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2016-3709 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.