CVE-2019-11831

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.

Published: 2019-05-09 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-11831 is rated High Risk (66.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 5.59%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize 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-2019-11831

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 2026-06-15 28.62% 5.59% -23.03%
2 2026-05-30 9.53% 28.62% +19.08%
3 2026-05-03 — 9.53% —

Full EPSS history (42 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-11831

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/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:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-11831

GitHub Security Advisory for CVE-2019-11831

GHSA-xv7v-rf6g-xwrc · Severity: critical · Ecosystem: composer — Directory Traversal in typo3/phar-stream-wrapper

OS Trackers for CVE-2019-11831

vendor priority summary link
ubuntu medium CVE-2019-11831 medium priority: Ubuntu including 1 source packages (drupal7), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 16, needed 2, needs-triage 1. https://ubuntu.com/security/CVE-2019-11831

Affected software / configurations for CVE-2019-11831

Vendor Product Version Raw CPE
typo3 pharstreamwrapper >= 2.0.0, < 2.1.1 cpe:2.3:a:typo3:pharstreamwrapper:*:*:*:*:*:*:*:*
typo3 pharstreamwrapper >= 3.0.0, < 3.1.1 cpe:2.3:a:typo3:pharstreamwrapper:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
fedoraproject fedora 28 cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
drupal drupal >= 7.0, < 7.67 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 8.6.0, < 8.6.16 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 8.7.0, < 8.7.1 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
joomla joomla\! >= 3.9.3, <= 3.9.5 cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*

References for CVE-2019-11831

URL Tags
http://www.securityfocus.com/bid/108302 Third Party Advisory VDB Entry
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v2.1.1 Release Notes Third Party Advisory
https://github.com/TYPO3/phar-stream-wrapper/releases/tag/v3.1.1 Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00029.html Mailing 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/36 Issue Tracking Mailing List Third Party Advisory
https://typo3.org/security/advisory/typo3-psa-2019-007/ Vendor Advisory
https://www.debian.org/security/2019/dsa-4445 Third Party Advisory
https://www.drupal.org/sa-core-2019-007 Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_22 Third Party Advisory
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