CVE-2020-25787 Server-side request forgery in n/a

Critical 9.8 Published 19 Sep 2020 Updated 23 Dec 2025

Attackers can exploit insufficient URL validation in Tiny Tiny RSS to perform Server-Side Request Forgery, potentially accessing internal resources.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-25787?

CVE-2020-25787 is a critical server-side request forgery vulnerability in n/a, published on 19 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. It does not validate all URLs before requesting them.

Weakness: CWE-20

Which versions are affected by CVE-2020-25787?

It affects 1 product.

Products include Tt-Rss Tiny Tiny Rss.

How do I fix CVE-2020-25787?

Upgrade to a fixed version.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2020-25787 being exploited?

There is no known exploitation of CVE-2020-25787 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Sources

Also known as DEBIAN-CVE-2020-25787, GHSA-8966-pp95-9j6j, UBUNTU-CVE-2020-25787.