CVE-2021-3902 Information

Description

An improper restriction of external entities (XXE) vulnerability in dompdf/dompdf’s SVG parser allows for Server-Side Request Forgery (SSRF) and deserialization attacks. This issue affects all versions prior to 2.0.0. The vulnerability can be exploited even if the isRemoteEnabled option is set to false. It allows attackers to perform SSRF disclose internal image files and cause PHAR deserialization attacks.

Reference

https://huntr.com/bounties/a6071c07-806f-429a-8656-a4742e4191b1 https://github.com/dompdf/dompdf/commit/f56bc8e40be6c0ae0825e6c7396f4db80620b799