DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the file_get_contents() function. An attacker who can upload files of any type to the server can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution, especially when DOMPdf is used with frameworks with documented POP chains like Laravel or vulnerable developer code.

The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4427 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4427-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Abhijith PA     December 30, 2025                             https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : php-dompdf     Version        : 0.6.2+dfsg-3.1+deb11u1     CVE ID         : CVE-2021-3838 CVE-2022-2400

    Two vulnerabilities were discovered in php-dompdf, a PHP library to     convert HTML to PDF.

    CVE-2021-3838

        php-dompdf is vulnerable to PHAR deserialization due to a lack of         checking on the protocol before passing it into the         file_get_contents() function. An attacker who can upload files of         any type to the server can pass in the phar:// protocol to         unserialize the uploaded file and instantiate arbitrary PHP         objects. This can lead to remote code execution, especially when         DOMPdf is used with frameworks with documented POP chains like         Laravel or vulnerable developer code

    CVE-2022-2400

        php-dompdf was vulnerable to External Control of File Name bypassing         unallowed access verification.

    For Debian 11 bullseye, these problems have been fixed in version     0.6.2+dfsg-3.1+deb11u1.

    We recommend that you upgrade your php-dompdf packages.

    For the detailed security status of php-dompdf please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-dompdf

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the
    protocol before passing it into the file_get_contents() function. An attacker who can upload files of any
    type to the server can pass in the phar:// protocol to unserialize the uploaded file and instantiate
    arbitrary PHP objects. This can lead to remote code execution, especially when DOMPdf is used with
    frameworks with documented POP chains like Laravel or vulnerable developer code. (CVE-2021-3838)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6277-2 advisory.

    USN-6277-1 fixed vulnerabilities in Dompdf. This update provides the corresponding updates for Ubuntu     22.04 LTS.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6277-1 advisory.

    It was discovered that Dompdf was not properly validating untrusted input when processing HTML content     under certain circumstances. An attacker could possibly use this issue to expose sensitive information or     execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2014-5011, CVE-2014-5012,     CVE-2014-5013)

    It was discovered that Dompdf was not properly validating processed HTML content that referenced PHAR     files, which could result in the deserialization of untrusted data. An attacker could possibly use this     issue to execute arbitrary code. (CVE-2021-3838)

    It was discovered that Dompdf was not properly validating processed HTML content that referenced both a     remote base and a local file, which could result in the bypass of a chroot check. An attacker could     possibly use this issue to expose sensitive information. (CVE-2022-2400)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3495 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3495-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     July 13, 2023                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : php-dompdf     Version        : 0.6.2+dfsg-3+deb10u1     CVE ID         : CVE-2021-3838 CVE-2022-2400     Debian Bug     : #1015874

    Multiple vulnerabilies were fixed in php-dompdf a CSS 2.1 compliant HTML     to PDF converter, written in PHP.

    CVE-2021-3838

        php-dompdf was vulnerable to deserialization of Untrusted Data using         PHAR deserialization (phar://) as url for image.

    CVE-2022-2400

        php-dompdf was vulnerable to External Control of File Name bypassing         unallowed access verification.

    For Debian 10 buster, these problems have been fixed in version     0.6.2+dfsg-3+deb10u1.

    We recommend that you upgrade your php-dompdf packages.

    For the detailed security status of php-dompdf please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-dompdf

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
280147	Debian dla-4427 : php-dompdf - security update	Nessus	Debian Local Security Checks	critical
410645	SCA: security update for dompdf/dompdf (GHSA-577p-7j7h-2jgf)	Tenable Cloud Security	SCA Checks	critical
410645	SCA: security update for dompdf/dompdf (GHSA-577p-7j7h-2jgf)	Tenable Self-Hosted Container Security	SCA Checks	critical
179659	Ubuntu 22.04 LTS : Dompdf vulnerabilities (USN-6277-2)	Nessus	Ubuntu Local Security Checks	critical
179459	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS : Dompdf vulnerabilities (USN-6277-1)	Nessus	Ubuntu Local Security Checks	critical
178290	Debian dla-3495 : php-dompdf - security update	Nessus	Debian Local Security Checks	critical

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