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.
github.com/spipu/html2pdf
github.com/spipu/html2pdf/blob/master/CHANGELOG.md
github.com/spipu/html2pdf/commit/100a4d509abf8550765cf0e0da83e83abb422585
github.com/spipu/html2pdf/commit/2e6bab9a2afe9cfd4d3c3038da64d8ad74e41d7f
github.com/spipu/html2pdf/releases/tag/v5.2.4
nvd.nist.gov/vuln/detail/CVE-2021-45394
www.synacktiv.com/sites/default/files/2022-01/html2pdf_ssrf_deserialization.pdf