CVE-2020-8902: SSRF in Rendertron

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-23 · updated 2026-06-17
Weakness: CWE-284

Description

Rendertron versions prior to 3.0.0 are are susceptible to a Server-Side Request Forgery (SSRF) attack. An attacker can use a specially crafted webpage to force a rendertron headless chrome process to render internal sites it has access to, and display it as a screenshot. Suggested mitigations are to upgrade your rendertron to version 3.0.0, or, if you cannot update, to secure the infrastructure to limit the headless chrome's access to your internal domain.

Affected products

Google LLC Rendertron: before 3.0.0 — fixed in 3.0.0

How to fix

Upgrade to a fixed version: Google LLC Rendertron 3.0.0. Check the vendor advisory for mitigations.

References

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