CVE-2020-21527 Path traversal in n/a

High 7.7 Published 30 Sep 2020 Updated 4 Aug 2024

An attacker can delete arbitrary files on the server via directory traversal in the backup deletion function of the Halo blog platform.

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

What is CVE-2020-21527?

CVE-2020-21527 is a high-severity path traversal vulnerability in n/a, published on 30 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

There is an Arbitrary file deletion vulnerability in halo v1.1.3. A backup function in the background allows a user, when deleting their backup files, to delete any files on the system through directory traversal.

Weakness: CWE-22

Which versions are affected by CVE-2020-21527?

It affects 1 product.

Products include Halo Halo.

How do I fix CVE-2020-21527?

No fix has been published for CVE-2020-21527 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-21527 being exploited?

There is no known exploitation of CVE-2020-21527 in the wild and no public exploit code.

Sources

Also known as GHSA-v2gh-h86w-h9rq.