CVE-2019-11831

Name: CVE-2019-11831
Creator: NVD / NIST
Published: 2019-05-09T04:29:01.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.59%

Last modified Jun 17, 2026

CVE-2019-11831 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a phar:///path/bad.phar/../good.phar URL.. EPSS estimates a 5.59% chance of exploitation in the next 30 days.

Description

The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a phar:///path/bad.phar/../good.phar URL.

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

5.59%

91.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Typo3	Pharstreamwrapper	>= 2.0.0, < 2.1.1
Typo3	Pharstreamwrapper	>= 3.0.0, < 3.1.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	28
Fedoraproject	Fedora	29
Fedoraproject	Fedora	30
Drupal	Drupal	>= 7.0, < 7.67
Drupal	Drupal	>= 8.6.0, < 8.6.16
Drupal	Drupal	>= 8.7.0, < 8.7.1
Joomla	Joomla\!	>= 3.9.3, <= 3.9.5

References

http://www.securityfocus.com/bid/108302Third Party Advisory, VDB Entry
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v2.1.1Release Notes, Third Party Advisory
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v3.1.1Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00029.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/65ODQHDHWR74L6TCAPAQR5FQHG6MCXAW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QDJVUJPUW3RZ4746SC6BX4F4T6ZXNBH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUEXS4HRI4XZ2DTZMWAVQBYBTFSJ34AR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E3NUKPG7V4QEM6QXRMHYR4ABFMW5MM2P/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6JX7WR6DPMKCZQP7EYFACYXSGJ3K523/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z246UWBXBEKTQUDTLRJTC7XYBIO4IBE4/
https://seclists.org/bugtraq/2019/May/36Issue Tracking, Mailing List, Third Party Advisory
https://typo3.org/security/advisory/typo3-psa-2019-007/Vendor Advisory
https://www.debian.org/security/2019/dsa-4445Third Party Advisory
https://www.drupal.org/sa-core-2019-007Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_22Third Party Advisory
http://www.securityfocus.com/bid/108302Third Party Advisory, VDB Entry
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v2.1.1Release Notes, Third Party Advisory
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v3.1.1Release Notes, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00029.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/65ODQHDHWR74L6TCAPAQR5FQHG6MCXAW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6QDJVUJPUW3RZ4746SC6BX4F4T6ZXNBH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUEXS4HRI4XZ2DTZMWAVQBYBTFSJ34AR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E3NUKPG7V4QEM6QXRMHYR4ABFMW5MM2P/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6JX7WR6DPMKCZQP7EYFACYXSGJ3K523/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z246UWBXBEKTQUDTLRJTC7XYBIO4IBE4/
https://seclists.org/bugtraq/2019/May/36Issue Tracking, Mailing List, Third Party Advisory
https://typo3.org/security/advisory/typo3-psa-2019-007/Vendor Advisory
https://www.debian.org/security/2019/dsa-4445Third Party Advisory
https://www.drupal.org/sa-core-2019-007Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_22Third Party Advisory

Timeline

Published: May 9, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11831?

How severe is CVE-2019-11831?

CVE-2019-11831 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.59% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11831?

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-2019-11831?

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

Scan your code now

Source: NVD / NIST