Insecure deserialization in Drupal implementation of Phar Stream Wrapper Interceptor

Published: 2019-05-09
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-11831
Exploitation vector Network
Public exploit N/A
Vulnerable software
Web applications / CMS

Vendor Drupal

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Deserialization of untrusted data

EUVDB-ID: #VU18416

Risk: High


CVE-ID: CVE-2019-11831

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data passed via phar archives. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


The vulnerability exists due to inclusion of a third-party software Phar Stream Wrapper Interceptor into Drupal core.

Vulnerable software versions

Drupal: 7.0 - 7.66, 8.6.0 - 8.6.15, 8.7.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?