CVE-2020-8902: SSRF in Rendertron

rendertron Updated 02 Oct 2025

Summary

01/03/2021

Disclosed on

CVE-2020-8902

CVE

Yes i

Fix available

Moderate

Severity

Not published

CVSS Score

CVE-2020-8902: SSRF in Rendertron. Affects rendertron versions < 3.0.0. Fixed in 3.0.0. How to fix ↓

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Background

Rendertron is an open-source project that provides a middleware for rendering JavaScript-rendered pages on the server side. It utilizes headless Chrome to capture screenshots of web pages. This vulnerability affects Rendertron versions prior to 3.0.0. The vulnerability allows an attacker to exploit a Server-Side Request Forgery (SSRF) vulnerability, enabling them to force Rendertron to render internal sites it has access to and display them as screenshots.

Vulnerability Detail

The SSRF vulnerability in Rendertron arises due to insufficient input validation. By crafting a specially designed webpage, an attacker can manipulate Rendertron to make requests to internal sites and retrieve their content. This can lead to unauthorized access to sensitive information, potential data leakage, and further exploitation of internal systems. The vulnerability has a moderate severity rating (CWE-918).

How To Fix

Minimum fixed version

3.0.0

This is the first release that contains the fix.

npm install rendertron@3.0.0

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Workaround

There is no specific workaround provided for this vulnerability.

Conclusion

Rendertron versions prior to 3.0.0 are vulnerable to a Server-Side Request Forgery (SSRF) attack. It is recommended to upgrade to version 3.0.0 or secure the infrastructure to mitigate the risk. For further assistance on vulnerability remediation, please contact DevNack.com.

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