CVE-2021-3902: Dompdf Project Dompdf

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

• Dompdf Project Dompdf: before 2.0.0 (fixed in 2.0.0)

Published 2024-11-15. Last modified 2026-06-17.