What’s Vulnerable › Vulnerabilities

CVE-2021-45394

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-18 · updated 2026-06-17
• Weakness: CWE-502

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.

Affected products

• Html2Pdf Project Html2Pdf: before 5.2.4 — fixed in 5.2.4

How to fix

Upgrade to a fixed version: Html2Pdf Project Html2Pdf 5.2.4. Check the vendor advisory for mitigations.

References

• https://github.com/spipu/html2pdf
• https://github.com/spipu/html2pdf/blob/master/CHANGELOG.md
• https://www.synacktiv.com/sites/default/files/2022-01/html2pdf_ssrf_deserialization.pdf
• https://github.com/spipu/html2pdf
• https://github.com/spipu/html2pdf/blob/master/CHANGELOG.md
• https://www.synacktiv.com/sites/default/files/2022-01/html2pdf_ssrf_deserialization.pdf

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