CVE-2016-1000004

Name: CVE-2016-1000004
Creator: NVD / NIST
Published: 2020-02-19T13:15:10.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2016-1000004 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Insufficient type checks were employed prior to casting input data in SimpleXMLElement_exportNode and simplexml_import_dom. This issue affects HHVM versions prior to 3.9.5, all versions between 3.10.0 and 3.12.3 (inclusive), and all versions between 3.13.0 and 3.14.1 (inclusive).. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

Insufficient type checks were employed prior to casting input data in SimpleXMLElement_exportNode and simplexml_import_dom. This issue affects HHVM versions prior to 3.9.5, all versions between 3.10.0 and 3.12.3 (inclusive), and all versions between 3.13.0 and 3.14.1 (inclusive).

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.68%

47.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-345

Affected Software

Vendor	Product	Versions
Facebook	Hhvm	< 3.9.5
Facebook	Hhvm	>= 3.10.0, <= 3.12.3
Facebook	Hhvm	>= 3.13.0, <= 3.14.1

References

https://github.com/facebook/hhvm/commit/8e7266fef1f329b805b37f32c9ad0090215ab269Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2016-1000004Third Party Advisory
https://github.com/facebook/hhvm/commit/8e7266fef1f329b805b37f32c9ad0090215ab269Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2016-1000004Third Party Advisory

Timeline

Published: Feb 19, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-1000004?

How severe is CVE-2016-1000004?

CVE-2016-1000004 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2016-1000004?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-1000004?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST