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Fencer Vulns
medium 6.1

CVE-2016-3709 json

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

published 2022-07-28 4 y ago modified 2026-10-14 25 d ago also EUVD-2016-4730 , JLSEC-2025-76

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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

Patch / fix

  • julia XML2_jll 2.9.12+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • libxml2 Debian 14, Debian 13, Debian 12 2.9.12+dfsg-3

debian advisories DEBIAN-CVE-2016-3709

  • libxml2 Ubuntu 18.04 LTS 2.9.4+dfsg1-6.1ubuntu1.7
  • libxml2 Ubuntu 20.04 LTS 2.9.10+dfsg-5ubuntu0.20.04.4
  • libxml2 Ubuntu Pro 16.04 LTS 2.9.3+dfsg1-1ubuntu0.7+esm3

ubuntu advisories UBUNTU-CVE-2016-3709

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxml2 RHEL 8 2.9.7-15.el8
  • python3-libxml2 RHEL 8 2.9.7-15.el8
  • libxml2 RHEL 8.6 EUS 2.9.7-13.el8_6.2
  • python3-libxml2 RHEL 8.6 EUS 2.9.7-13.el8_6.2

red hat advisories RHSA-2023:4767RHSA-2022:7715

  • libxml2 SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 2.9.4-46.65.1
  • python-libxml2 SLES for SAP 12 SP5, SLES 12 SP5 2.9.4-46.65.1
  • libxml2 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +21 more 2.9.7-150000.3.51.1
  • python-libxml2-python SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +22 more 2.9.7-150000.3.51.1
  • libxml2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 2.9.4-46.59.2
  • python-libxml2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +5 more 2.9.4-46.59.3

suse advisories SUSE-SU-2023:3665-1SUSE-SU-2022:3871-1SUSE-SU-2022:3717-1

  • libxml2 AlmaLinux 8 2.9.7-15.el8
  • python3-libxml2 AlmaLinux 8 2.9.7-15.el8

almalinux advisories ALSA-2022:7715

  • libxml2 Rocky Linux 8 2.9.7-15.el8

rocky linux advisories RLSA-2022:7715

  • libxml2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 2.9.11-r0

alpine advisories ALPINE-CVE-2016-3709

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxml2 CBL-Mariner 2.0 2.10.4-1

azure linux advisories AZL-10442

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-3709 updated cvss 6.1

libxml2: Incorrect server side include parsing can lead to XSS

  • Red Hat Enterprise Linux 6 libxml2, libxml2-python Red Hat Enterprise Linux 7 libxml2, libxml2-python
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) libxml2-devel 2.9.7-15.el8, libxml2-debuginfo 2.9.7-15.el8, libxml2-debugsource 2.9.7-15.el8, python3-libxml2-debuginfo 2.9.7-15.el8
    fixed: vendor fix RHSA-2022:7715
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) libxml2-devel 2.9.7-13.el8_6.2, libxml2-debuginfo 2.9.7-13.el8_6.2, libxml2-debugsource 2.9.7-13.el8_6.2, python3-libxml2-debuginfo 2.9.7-13.el8_6.2
    fixed: vendor fix RHSA-2023:4767
  • Red Hat Enterprise Linux BaseOS (v. 8) libxml2 2.9.7-15.el8, python3-libxml2 2.9.7-15.el8
    fixed: vendor fix RHSA-2022:7715
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) libxml2 2.9.7-13.el8_6.2, python3-libxml2 2.9.7-13.el8_6.2
    fixed: vendor fix RHSA-2023:4767
  • Red Hat Enterprise Linux 9 libxml2, python3-libxml2 Red Hat JBoss Core Services libxml2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 6.1

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.31% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • mail.gnome.org https://mail.gnome.org/archives/xml/2018-January/msg00010.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
julia XML2_jll
<2.9.12+0
2.9.12+0

Affected products

  • n/a libxml2
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.