CVE-2016-9180

perl-XML-Twig: The option to `expand_external_ents`, documented as controlling external entity expansion in XML::Twig does not work. External entities are always expanded, regardless of the option's setting.

Published: 2016-12-22 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9180 is rated Moderate Risk (57.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.43%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-9180

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-06-19 0.81% 0.43% -0.38%
2 2025-03-30 2.42% 0.81% -1.61%
3 2025-03-29 — 2.42% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9180

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2016-9180

OS Trackers for CVE-2016-9180

vendor priority summary link
debian low CVE-2016-9180 low priority: Debian including 1 source packages (libxml-twig-perl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-9180
redhat medium — https://access.redhat.com/security/cve/CVE-2016-9180
suse high CVE-2016-9180 severity important: SUSE including 238 source package names (21:perl-XML-Twig-3.52-3.3.1, amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, …), 375 product×package rows across 145 product lines (Container suse/kiosk/xorg, HPE Helion OpenStack 8, … (145 product lines)): Known Affected 231, Fixed 144. https://www.suse.com/security/cve/CVE-2016-9180/
ubuntu low CVE-2016-9180 low priority: Ubuntu including 1 source packages (libxml-twig-perl), 23 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): ignored 13, not-affected 6, needed 2, DNE 1, released 1. https://ubuntu.com/security/CVE-2016-9180

Affected software / configurations for CVE-2016-9180

Vendor Product Version Raw CPE
xmltwig xml-twig_for_perl — cpe:2.3:a:xmltwig:xml-twig_for_perl:-:*:*:*:*:*:*:*

References for CVE-2016-9180

cvelogic Threat Intelligence