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CVE-2019-11831

33
FAUCET Score

CVE-2019-11831 is a critical directory traversal vulnerability in the PharStreamWrapper package (versions 2.x before 2.1.1 and 3.x before 3.1.1) used by TYPO3, Debian, Drupal, FedoraProject, and Joomla. This flaw allows attackers to bypass deserialization protection mechanisms, potentially leading to full compromise of affected systems. With a CVSS score of 9.8 (CRITICAL), it is easily exploitable over the network without user interaction, resulting in high impact to confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, its high EPSS and FAUCET Risk Score indicate a significant threat.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.1.1CPE matchmatch criteria
cpe:2.3:a:typo3:pharstreamwrapper:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.1.1CPE matchmatch criteria
cpe:2.3:a:typo3:pharstreamwrapper:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.59%
Probability of exploitation in next 30 days
EPSS Percentile
92.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0559 is in the 86th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

composerpatch availablevia ghsa
Product: typo3/phar-stream-wrapperFixed in: 2.1.1
composerpatch availablevia ghsa
Product: typo3/phar-stream-wrapperFixed in: 3.1.1
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 7.67.0
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 8.6.16
composerpatch availablevia ghsa
Product: drupal/coreFixed in: 8.7.1
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 7.67.0
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 8.6.16
composerpatch availablevia ghsa
Product: drupal/drupalFixed in: 8.7.1

Vendor Advisories (1)

composerGHSA-xv7v-rf6g-xwrccritical

Directory Traversal in typo3/phar-stream-wrapper

Sep 30, 2021

References

github.com / TYPO3/phar-stream-wrapper/releases/tag/v2.1.1
Release NotesThird Party Advisory
github.com / TYPO3/phar-stream-wrapper/releases/tag/v3.1.1
Release NotesThird Party Advisory
lists.debian.org / debian-lts-announce/2019/05/msg00029.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/65ODQHDHWR74L6TCAPAQR5FQHG6MCXAW
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6QDJVUJPUW3RZ4746SC6BX4F4T6ZXNBH
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/AUEXS4HRI4XZ2DTZMWAVQBYBTFSJ34AR
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/E3NUKPG7V4QEM6QXRMHYR4ABFMW5MM2P
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/U6JX7WR6DPMKCZQP7EYFACYXSGJ3K523
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Z246UWBXBEKTQUDTLRJTC7XYBIO4IBE4
seclists.org / bugtraq/2019/May/36
Issue TrackingMailing ListThird Party Advisory
typo3.org / security/advisory/typo3-psa-2019-007
Vendor Advisory
debian.org / security/2019/dsa-4445
Third Party Advisory
drupal.org / sa-core-2019-007
Third Party Advisory
synology.com / security/advisory/Synology_SA_19_22
Third Party Advisory
securityfocus.com / bid/108302
Third Party AdvisoryVDB Entry