Critical severity9.8NVD Advisory· Published Nov 15, 2024· Updated Jun 17, 2026
CVE-2021-3838
CVE-2021-3838
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
dompdf/dompdfPackagist | < 2.0.0 | 2.0.0 |
Affected products
3Patches
Vulnerability mechanics
References
4- github.com/dompdf/dompdf/commit/99aeec1efec9213e87098d42eb09439e7ee0bb6anvdPatchWEB
- huntr.com/bounties/0bdddc12-ff67-4815-ab9f-6011a974f48envdExploitIssue TrackingPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-577p-7j7h-2jgfghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-3838ghsaADVISORY
News mentions
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