critical
CVE-2021-3838
DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due ...
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, GHSA. Rated lower by Ubuntu (medium).
Description
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| composer::GitHub Security Advisory Composer | dompdf/dompdf | 2.0.0 |
| debian 10 | php-dompdf | 0.6.2+dfsg-3+deb10u2 |
| debian 11 | php-dompdf | 0.6.2+dfsg-3.1+deb11u1 |
| debian 12 | php-dompdf | 2.0.2+dfsg-1 |
| echo | php-dompdf | 2.0.2+dfsg-1 |
| rapidfort ubuntu 20.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| rapidfort ubuntu 22.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| rapidfort ubuntu 24.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| ubuntu 16.04-ESM | php-dompdf | 0.6.1+dfsg-2ubuntu1+esm1 |
| ubuntu 18.04-ESM | php-dompdf | 0.6.2+dfsg-3ubuntu0.18.04.1~esm1 |
| ubuntu 20.04 | php-dompdf | 0.6.2+dfsg-3ubuntu0.20.04.1 |
| ubuntu 20.04-ESM | php-dompdf | 0.6.2+dfsg-3ubuntu0.20.04.1 |
Show all 13 entries from 13 sources
| Source | Package | Fixed in |
|---|---|---|
| composer::GitHub Security Advisory Composer | dompdf/dompdf | 2.0.0 |
| debian 10 | php-dompdf | 0.6.2+dfsg-3+deb10u2 |
| debian 11 | php-dompdf | 0.6.2+dfsg-3.1+deb11u1 |
| debian 12 | php-dompdf | 2.0.2+dfsg-1 |
| echo | php-dompdf | 2.0.2+dfsg-1 |
| rapidfort ubuntu 20.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| rapidfort ubuntu 22.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| rapidfort ubuntu 24.04 | php-dompdf | 0:0.6.2+dfsg-3.1ubuntu0.1 |
| ubuntu 16.04-ESM | php-dompdf | 0.6.1+dfsg-2ubuntu1+esm1 |
| ubuntu 18.04-ESM | php-dompdf | 0.6.2+dfsg-3ubuntu0.18.04.1~esm1 |
| ubuntu 20.04 | php-dompdf | 0.6.2+dfsg-3ubuntu0.20.04.1 |
| ubuntu 20.04-ESM | php-dompdf | 0.6.2+dfsg-3ubuntu0.20.04.1 |
| ubuntu 22.04 | php-dompdf | 0.6.2+dfsg-3.1ubuntu0.1 |
References
- https://github.com/dompdf/dompdf
- https://github.com/dompdf/dompdf/commit/99aeec1efec9213e87098d42eb09439e7ee0bb6a
- https://github.com/dompdf/dompdf/issues/2564
- https://huntr.com/bounties/0bdddc12-ff67-4815-ab9f-6011a974f48e
- https://huntr.dev/bounties/0bdddc12-ff67-4815-ab9f-6011a974f48e
- https://nvd.nist.gov/vuln/detail/CVE-2021-3838
- https://ubuntu.com/security/notices/USN-6277-1
- https://ubuntu.com/security/notices/USN-6277-2