CVE-2020-28873 Denial of service in n/a

High 7.5 Published 17 Mar 2021 Updated 9 Jul 2026

An attacker can cause server CPU and memory exhaustion by submitting an extremely long password to the login form, leading to denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-28873?

CVE-2020-28873 is a high-severity denial of service vulnerability in n/a, published on 17 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Fluxbb 1.5.11 is affected by a denial of service (DoS) vulnerability by sending an extremely long password via the user login form. When a long password is sent, the password hashing process will result in CPU and memory exhaustion on the server.

Weakness: CWE-916

Which versions are affected by CVE-2020-28873?

It affects 1 product.

Products include Fluxbb Fluxbb.

How do I fix CVE-2020-28873?

No fix has been published for CVE-2020-28873 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-28873 being exploited?

There is no known exploitation of CVE-2020-28873 in the wild and no public exploit code.

Sources

Also known as GHSA-275f-jq4p-wxgw.