Cross-site Scripting in HTML2PDF

HIGH 8.8CVE-2021-45394 · GHSA-6m93-343m-3jrc · Published 18/01/2022 · updated 17/06/2026

In short

CVE-2021-45394 is a HIGH (CVSS 8.8) vulnerability affecting spipu/html2pdf, html2pdf (html2pdf project).
Chance of exploitation in the next 30 days (EPSS): 1.6%, higher than 75.6% of all vulnerabilities.
Fix: update to 5.2.4 or later.

Package	Affected versions	Patched versions
spipu/html2pdf Packagist	`< 5.2.4`	`5.2.4`
html2pdf html2pdf_project	`< 5.2.4`	`5.2.4`

Description

An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.

NVD description

An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.

References

nvd.nist.gov/vuln/detail/CVE-2021-45394 · ADVISORY
spipu/html2pdf commit 100a4d5 · WEB
spipu/html2pdf commit 2e6bab9 · WEB
spipu/html2pdf · PACKAGE
spipu/html2pdf · WEB
spipu/html2pdf release v5.2.4 · WEB
synacktiv.com/sites/default/files/2022-01/html2pdf_ssrf_deserialization.pdf · WEB

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